技术合作生产协议书（精选3篇）
甲方：
地址：
乙方：
地址：
丙方：
地址：
丁方：
地址：
为促进区域经济发展，尽快使企业启动出效益，甲乙丙丁四方本着平等自愿互利互惠的原则，经充分协商，甲方愿将服装车间之设备、设施作为合作投入（锅炉、油炉及化工设备设施）供生产使用，原服装厂之房屋、设施及地皮，因属于集体财产，故只能租赁不得作为股份改变性质，具体如下：
一、合作期限为_________年，即从________年_______月_______日至________年_______月_______日止，如到时各方愿意继续合作可另行续签。
二、原服装厂区内设施包括：厂房_________间（其中生产用厂房_________间，生产厂房_________间）机井_________眼，潜水泵_________台及厂区设施地皮等。可租赁给公司，年租金_________万元（_________万元），由公司负担，每年的_________月_________日前，应将租金一次_____给甲方。超期应按日_________%的违约金进行支付，否则终止租赁合同。
三、各方投入及股份的分配
1、甲方投入_________万元（已投入），乙丙丁三方投入_________万元（已投入_________万元，还应继续投入_________万元）。
2、股份及利润分红，甲方_________%、乙方_________%、丙方_________%、丁方_________%；利润每月考核一次，除留足再生产资金外，各户股东每一季度按股份分红一次。
四、在合作期间有关工商、税务、环保、电力、技术、劳动、安全等职能部分的有关费用，统一由公司负责。
五、公司领导权责
1、总经理负责公司的全面生产、经营及宏观调控财务等工作。
2、副总经理，在总经理领导下配合总经理负责好各自的份内工作。
3、生产经营主管，在总经理领导下负责好各自的份内工作，对特殊情况下应紧急处理的事，可先处理后汇报。
4、总经理有权处理_________万元以下生产性开支和_________万元以下非生产性开支，超过部分应由公司讨论通过。
5、副总经理在总经理外出或其他总经理不能亲自处理的业务时，行使总经理权力，外出办理业务有权处理生产性开支_________万元以下，非生产性开支_________元以下。
6、生产经营主管，在总、副经理领导下除搞好本质工作外，有权处理生产性开支_________元以下，非生产性开支_________元以下。
六、如新建、改建房屋结构或厂区内新建任何改变原厂区形状，必须事先征得甲方同意后方可施工，所需资金均由公司承担。
七、违约责任
在合作期内，各方必须依法自主经营，在经营期间任何人不得弄虚作假、__________，一经发现合作终止，所有股份均充公；在经营期内所发生的一切债权、债务由公司承担；_________年_________月_________日以前的债权、债务由四方负担。
八、在协议有效期间，公司对甲方的厂房、公共设施及设备只有使用权，不准出售、转让和抵押，特殊情况四方协商解决。
九、为创造一个良好的经营环境，每月_________日前必须将上月工人工资全部支付，不准以任何理由拖欠，如拖欠超过_________日，将按日_________%支直至付清为止。
十、合同生效，甲方不得以任何不正当理由给公司施压影响正常经营；如遇人力不可抗力之因素造成合同终止，乙丙丁三方有权将新增设备拆走。
十一、合同生效开工之前必须将原欠工资债权、债务结清，否则不得开工。
十二、未尽事宜四方协商解决，本合同各方签字后生效，本合同一式_________份，各方各持_________份。
甲方：
身份证号：
联系方式：
签约地：
签约时间：________年_______月_______日
乙方：
身份证号：
联系方式：
签约地：
签约时间：________年_______月_______日
丙方：
身份证号：
联系方式：
签约地：
签约时间：________年_______月_______日
丁方：
身份证号：
联系方式：
签约地：
签约时间：________年_______月_______日
甲方：
乙方：
为了更好地拓展__________的市场，更好地服务于客户，充分发挥甲乙双方各自的优势，双方抱着诚实、互信、双赢、共赢的态度，经友好协商达成如下协议：
第一条、合作方式
1、由甲方为合作项目提供场地，并按照乙方的要求和设计图建设合作项目的生产车间和安装生产设备，所产生的费用由乙方负担。
2、由甲方提供合作项目的生产工人，产生的人员工资、福利由乙方负担。
3、乙方每月向甲方购买_________，用于合作项目的开发。
第二条、合作项目
1、项目名称：_________________________。
2、项目经营范围：_________________________。
3、项目经营地址：_________________________。
第三条、合作时间
合作期限为_______年，自本协议签字生效之日算起。期满后双方如有继续合作的愿望，以本协议为基础重新签订协议。
第四条、合作分工
甲方负责____________的研发、生产、售前、售中及售后等工作；乙方负责____________的刀具和工装夹具的研发、制造以及市场宣传、推广、销售、维护及货款回收等工作。
第五条、保密条款
甲乙双方均不得对任何第三方泄露本合同主要内容，包括设备总价、设备型号及数量等。
第六条、收益分配
该项目所得利润根据合作方所占的不同股权比例按股分成，其中甲方占股权分成_____%，乙方占股权分成_____%。
第七条、违约责任
双方在合作期间，甲方不得以任何方式同与对方有竞争关系的第三方合作，否则承担因此给对方造成的全部经济损失，包括但不局限于已投入生产的费用、可预期实现利润以及因产生纠纷所产生的差旅费和_____等。
第八条、其他
1、未尽事宜，双方协商解决。
2、本协议经双方公司代表签字、盖章后生效。本协议一式____份，甲乙双方各____份。
甲方：（签章）
经办人：
地址：
电话：
签约日期：________年_______月_______日
乙方：（签章）
经办人：
地址：
电话：
签约日期：________年_______月_______日
第一条合同范围
_________公司(以下简称甲方)和_________公司(以下简称乙方)，经过友好协商，同意合资经营中速船用主机厂。
兹同合资经营条件尚未成熟，双方将以补偿贸易进行合作生产并以此作为双方合作的第一步，其条件如下：
1.1乙方将向甲方转让生产下列型号中速船用主机(以下简称合同产品)的技术秘密及全部技术资料，其型号如下：
1.2“技术文件资料”的定义范围及交付：
本合同1.1款所指的技术资料(以下简称资料)定义是乙方提供合同产品的技术资料由三大部分组成：即乙方现用的一般技术资料，产品设计图纸和生产技术资料，上述资料方包括详细的技术秘密。
(1)一般技术资料包括：
a.12v—600zc中速船用主机的技术规范(包括部装、总装、试车、交货试验等);
b.12v—400zc中速船用主机的主要零部件的技术规范;
c.合同产品中所使用的配套产品的外型尺寸、安装尺寸和性能参数的样本，
(2)产品设计图纸：
乙方提供合同产品的产品设计图纸应包括：
a.合同产品的全套施工图纸(包括总装图、部件图、系统图、原理图及全部零件的详细图纸);
b.合同产品的计算资料和计算书;
c.有关船级社发给的证书及交船级社验证的图纸、计算书及其他资料清单;
d.试验书设计图纸及其技术文件。
(3)生产技术资料：乙方提供的合同产品的生产技术资料应包括合同产品全部工艺性指导文件及主要零件的详细制造技术资料;
对原材料和合同产品零部件在生产过程中和生产后的质量检验要求，验收手段，验收步骤及验收技术文件。
(4)资料的修改：若乙方采用新技术改进产品、改进工艺过程，降低等需要对提供的资料进行修改时，应将修改的结果以书面形式提供给甲方。
(5)资料的提供方式：
a.对一般技术文件应提供三份蓝图或同等数量的清晰的复制图;
b.对产品设计图纸应提供一份生产底图及两份蓝图;
c.对生产技术资料应提供两份蓝图;
d.对已提供过的完全相同的重复资料，可免于提供，但需在清单中予以注明。
(6)资料的交付进度：
a.根据资料定义的规定，为生产12v—400zc型中速船用主机需要，乙方在签订合同后30天内需向甲方交付合同产品的全部技术资料和全部图纸;
b.根据资料定义的规定，为生产12v—600zc型中速船用主机的需要，乙方在鉴订合同后于_________年_________月_________日前，需向甲方交付合同产品的全部技术资料和图纸。
1.3甲方将生产的产品向乙方返销如下：
12v—400zc型中速船用主机，每年_________台;
12v—600zc型中速船用主机，每年_________台。
1.4以补偿贸易进行合作生产期限为2年，2年后若合资经营条件不成熟，则可延长合作生产期限，但最长不得超过5年。
第二条转让技术秘密和技术文件
2.1乙方向甲方提供合同产品的设计计算、产品图纸、制造工艺、质量控制和试验安装、调试、运转及维修等有关合同产品的全部技术资料，必须和乙方目前使用的资料内容相同。
2.2合同产品资料的审核和验证：
乙方对提供给甲方的产品设计图纸、制造技术资料的完整性、正确性、清晰性负责。
看产品设计图纸和生产技术资料中的任何部分发现有失误，当乙方接到甲方通知时立即补齐遗失部分或更改错误部分。
2.3在合作生产期间，乙方将以最优惠价格向甲方提供甲方方面市场不能提供的零部件。
具体内容另行商定。
2.4乙方保证向甲方转让的技术秘密和技术资料不受任何第三者的指控。
第三条价格和支付方式
3.1为了支付转让2.1条款中所规定的12v一400zc型中速船用主机的技术秘密和技术资料费用，乙方应向甲方交付费用如下：
_________年_________u.s.d(大写_________元整)
_________年_________u.s.d(大写_________元整)
_________年起以后的_________年中按每年将产值(即每年总产值扣除进口部分价值和税收费用后的产值)其提成费为_________%。
3.2合同签署生效后三十(30)天内，甲方按照由银行提交的乙方下列单据，予以第一次支付总金额的_________%，即_________u.s.d(大写：_________美元整)
(1)根据附件_________要求，提供第一批资料的空运提单;
(2)经甲方确认的__________________银行出具不可撤销的保函，正副本各一份;
(3)乙方方的商业发票：一式两份;
(4)乙方方即期汇票一式两份。
3.3于_________年_________月_________日甲方按收到乙方提交的下列单据后，予以第二次交付_________年总金额的_________%现金，即u.s.d(大写：_________美元整)。
(1)按附件_________要求于_________年_________月_________日提供第二批资料空运提单。
(2)乙方方商业发票一式两份。
(3)乙方方即期汇票一式两份。
3.4双方同意_________年用现金支付，_________年付_________%现金，其余_________%金额用甲方返销产品补偿。
3.5_________年的费用本年_________月_________日支付，乙方方交付商业发票一式两份。
3.6自_________年起及其各年份按3.1款规定的提成费用应在每年_________月_________日在收到乙方方商业发票(一式两份)后支付。
3.7在合作生产期间鉴于甲方遵照3.1款已向乙方交付了转让技术秘密的部分费用，各合资经营时机成熟，双方同意成立合资经营企业时，则乙方将其剩余部分的技术秘密费用可作提资的一部分。
一旦双方不能进行合资经营，在五(5)年之内合作生产被迫终止时，甲方确认向乙方支付技术秘密费用的剩余部分。
若出现上述情况，对支付技术秘密费用的进度和方式由双方在通常时候予以协商。
第四条合作生产的补偿贸易
4.1为有利甲方的外汇平衡，乙方同意甲方生产12v—400ze，12v—600zc中速船用主机返销给乙方。
4.2上述订单的总价必须保证不低于甲方每年向乙方反付购买零部件所需费用总额的_________%。
乙方同意在甲方补偿能力扩大及乙方需求扩大的前提下，其补偿的百分比可以不受限制。
4.3甲方将以优惠价格向甲方提供产品，其品种、数量、交货期等将由双方在每批合同中商定。
甲方产品必须符合乙方的标准。
4.4乙方要求在甲方接到上述产品图纸后立即试制12v—400zc型中速船用主机。
首批产品各一台将分别在双方进行试验，在试验合格的基础上乙方要求甲方于_________年内提供12v—400zc型中速船用主机_________台。
其价格、交货期在签订正式合同时商定。
第五条保证
5.1乙方保证，在合同有效期内所供应的资料应是最新技术的代身，其内容和甲方目前使用的完全一致。
5.2乙方保证所供资料是完整的、正确的、清晰的。
第六条税费
6.1凡因履行本合同需缴纳的一切税收，发生在甲方方以外的均由乙方承担。
6.2凡因履行本合同需缴纳的一切税费，发生在甲方以内的均由甲方承担。
第七条商标
7.1甲方有权使用乙方商标和合同产品的序号。
甲方将下列商标标明在甲方所生产的合同产品上。
7.2甲方制造的铬牌、报价单、技术规格书、广告、说明书、样本等，凡是合同产品均以甲方名称来表示。
第八条包装
8.1须用坚固的木箱包装，适合长途海运、防湿、防潮、防震、防锈、耐粗暴搬运。
由于包装不良所发生的损失，卖方应负担由此而产生的一切费用和/或损失。
8.2卖方应在每件包装上，用不退色油漆清楚地标刷件号、尺码、毛重、净重、“切勿受潮”等字样，并刷有下列唛头：_________
8.3装箱单两份，注明毛重、净重、尺码和所装货物每项的品名和数量。
第九条人力不可抗拒
9.1签约双方中的任何一方由于战争及严重的火灾、水灾、台风和地震或其他双方同意的事件而影响执行合同时，双方同意延长合同期限，延长时间相当于事故所影响的时间。
9.2责任方应尽快将发生的人力不可抗拒事故的情况用电报通知另一方，并在十四(14)天以内以航空、挂号信将有关部门出具的证明文件交给另一方确认。
9.3受人力不可抗拒事故延续到一至二十(20)天以上时，双方应通过友好协商尽快解决合同继续执行的问题。
第十条仲裁
10.1因执行本合同所发生的或与本合同有关的一切争执，双方应通过友好协商解决。
已经协商仍不能达成协议时，则提交仲裁解决。
10.2仲裁地点在瑞典斯德哥尔摩商会。
10.3仲裁裁决是终局裁决，对双方均有约束力。
10.4仲裁费用除仲裁机关另有裁决外，应由败诉方负担。
10.5除了在仲裁过程中进行仲裁的那部份外，合同的其余部分在仲裁期间仍继续执行。
第十一条合同生效及其他
11.1本合同于_________年_________月_________日由双方代表在_________正式签字，自签字之日起1周内本合同应经有关部门批准后生效。
11.2本合同以英文书就一式四份，双方各执一式两份。
11.3本合同有效期见第十一条所述。
11.4本合同附件为本合同不可分割的部份，与正文有同等效力。
11.5双方在本合同生效前交换的所有文件、函电等在本合同生效的同时自动失效。
11.6本合同只能根据同双方授权代表签名或盖章的书面文件进行变更、追加或修改。
11.7在执行合同期内双方的通讯均以函电进行，书信往来一式两份。
第十二条法定地址
甲方地址：_________乙方地址：_________
甲方(盖章)： 乙方(盖章)：
法定代表人(签字)：法定代表人(签字)：
_年____月____日_________年____月____日签订地点：_________
签订地点：_________附件article 1_________.(hereinafter referred to as part a)and _________.(hereinafter referred to as part b)have agreed， after friendly discussion， to run a medium speed marine main engine factory in the form of a joint - venture company. since the conditions for the joint - venture are not yet ready， both parties shall start up a joint - production with compensation trade as the first step of co - operation with the following conditions:1.1part b shall transfer the technical know - how and the complete technical documentation to part a for manufacturing medium speed marine main engines (hereinafter called contracted products) of the following types:12v- 400zc medium speed marine main engine;
12v- 600zc medium speed marine main engine.1.2definition， scope and delivery of technical documentation: the definition of technical documentation (hereinafter referred to as documentation) in article 1.1 of this contract means that the contracted products supplied by part b are composed of three parts: general technical documentation， products design drawings and manufacturing technical documentation， as used by part b. all of them should contain the technical know - how details.
(1)general technical documentation includes:a.the technical specifications of the medium speed marine main engine of type 12v- 600zc (including sub - assembly， assembly， test run， delivery tests， etc. );
b.the technical specifications of the main components of the medium speed marine main engine of type 12v - 400zc;
c.overall dimensions， installation dimensions， and performance data of the accessories used by the contracted products.
(2)products design drawing:products design drawings of the contract products supplied by part b， shall inclued:a.a complete set of production drawings of the contracted products (including the final assembly drawings， components drawings， system diagram， principle diagram， and detailed drawings of all components);
b.the calculating data and calculation manual of the contracted products;
c.drawings， calculating manual and other data given to the classification societies and certificate issued by the classification societies;
d.test platform design drawings and its technical documents.(3)manufacturing technical documentation:manufacturing technical documentation of the contracted products provided by part b shall include: the whole detailed instructive documentation and main components for the manufacturing of the contracted products， which shall include: requirements of quality inspection means， processes and technical conditions of acceptance test to the raw materials and components of the contracted products during and after the manufacturing processes.(4)modification of documentation:if the documentation to be supplied is modified by site as a result of using new technology to improve the products， processes and reduce the cost， the detailed information shall be submitted to part a in written form.(5)mode of providing documentation:a.for general technical documentation， three prints of three legible copies should be provided;
b.for design drawings， one manufacturing transparency and two prints shall be provided;
c.for manufacturing technical documentation， two prints shall be provided;
d.the duplicated documentation， which had been supplied before， can be exemped， but must be noted in the list.(6)delivery schedule of documentation:a.according to the definition of documentation， in order to facilitate the manufacturer of medium speed marine main engine of type 12v - 400zc， part b shall deliver the whole technical documentation and drawing of contracted products to part a within 30 days after the signing of the contract;
b.according to the definition of documentation in order to manufacture the medium speed maline main engine of type 12v - 600zc， site shall submit to part a the whole technical documentation and drawings of the contracted products before_________$$$after the signing of the contract.1.3the products manufactured by part a shall be resold to part b as follows:medium speed marine engine of type 12v - 400zc_________sets per year;
medium speed marine engine of type 12v- 600zc_________sets per year;
1.4the period of joint - production with compensation trade is two years. should the conditions for establishing a joint - venture be still not ready after the said period， the said period can be extended， but in no circumstances shall it be extended for more than five years.article 2 transfer of technical know- how and technical documentation2.1the complete technical documentation of designs， calculations， drawings， manufacturing processes， quality control， tests， installation， adjustment， operation and maintenance shall be provided by part b to part a concerning the contracted products and must be the same as those being currently used by part b.2.2checking and verifying the documentation of the contracted products:part b shall be responsible for the completeness， correctness and legibility of the product design drawings and manufacturing technical documentation sent to part a. in case any part of the said drawings and documentation are missing， part b shall make supplementary delivery of correction immediately upon notification by part b.2.3during the joint- production period， part b shall， at most favoured prices， supply part a with spare parts of the contracted products which are not available in the market of part a's side. these supplies are subject to separate agreements in due course.2.4part b guarantees that the transfer of the technical knowhow and technical documentation hereof will not involve any accusation from any third party.article 3 prices and termsof payment3.1part a shall pay part b for the transfer of technical knowhow and technical documentation of the medium speed marine main engine of type 12v- 400zc stipulated in clause 2.1 as follows:_________us _________(say: _________u.s.d. only)_________us _________(say: _________u.s.d. only)during the 2 years'period commencing from 19 ，the yearly fee shall be taken as _________% of the net annual production value (total annual production value minus the value of the imported parts and tax expenses).3.2the first payment is us $ _________(say: _________u.s.d.only) constituting% of total payment and shall be made within 30(thirty) days after the contract is signed and comes into force， upon receipt of the following documents from part b through the bank_________:
(1)supply air- freight bill of the first batch of documentation according to the requirement of appendix_________;
(2)irrevocable letter of guarantee in duplicate(one original，one copy)issued by_________band and confirmed by part a.(3)part b commercial invoice in duplicate;
(4)part b sight draft in duplicate.3.3the second payment shall amount to _________% of the total payment due in _________， i.e. _________u.s.d. (say: _________u.s.d. only) and shall be paid to part b on _________， _________. upon the receipt by part a from part b of the following documents:
(1)air - freightbillof thesecondbatchof documentationdeliveredbypart bon_________， _________，pursuant to stipulations in appendix_________;
(2)part b commercial invoice in duplicate;
(3)part b sight draft in duplicate.3.4both parties agree to settle in cash in _________while the settlement in _________will be_________% in cash and the remaining _________% shall be made through compensation of resale from part a.3.5the payment of _________ will be due on_________ th _________of the year upon receipt of the commercial invoices in duplicate from part b.3.6the yearly payments from 19onward as per clause 3.1. are due on _________， _________， of each year upon receipt of 2 copies of the commercial invoice from part b.3.7part of the know - how transferring fee would be paid to part b by part a as per clause 3.1. during the joint - production period， and the unpaid part would be converted as the investment of part b to the joint - venture when the joint-venture comes to realisation. should the joint - venture miscarry and the joint- production be forced to terminate within 5 (five) years， part a shall confirm that the unpaid part of the know - how transferring fee shall fully be remitted to part b by part a. in each of the above - mentioned cases， evaluating the mode of payment of the know - how transferring fee shall be agreed upon by both parties through consultation in due course.article 4 joint- production andcompensation trade4.1for the purpose of balancing part a' s foreign exchange， part b agrees to buy - back the medium speed marine main engines of type 12v- 400zc and 12v- 600zc produced by part a.4.2the total value of the above mentioned orders shall not be less than _________% of the expenses for purchasing components by part a from part b. part b agrees that under the prerequisite of increased compensation capability of part a and increased demand of part b the percentage of payments compensated through the back - sale of pite's products can be increased without limitation.4.3products supplied to part b by part a shall be at favourable prices， types， quantity， and delivery time of the products shall be agreed in the contract for every order by both pareties. quality of part a's products has to meet part b's standard.4.4part b shall require part a to start the trial production of medium speed marine main engine of type 12v - 400zc immediately upon receiving their drawings. the first products， one for each party， shall be tested separately by both parties and part b shall， on the basis of satisfactory tests， require part a to deliver_________( _________)sets of medium speed marine main engine of type 12v- 400zc within 19 _________. the prices and delivery periods shall be agreed upon when the contract is concluded.article 5 guarantee5.1part b guarantees that the documentation supplied shall be of the latest technological achievement within the valid period of the contract and shall be exactly identical with the documentation currently used by part b.5.2part b guarantees that the documentation supplied shall be complete， correct and legible.article 6 tax and duty6.1all taxes， customs and other duties in connection with the performance of the contract arising outside the part a side shall be borne by part b.6.2all taxes， customs and other duties in connection with the performance of the contract arising inside the part a side shall be borne by part a.article 7 trademark7.1part a shall have the right to use the part b trademark and serial number of contracted products. part a shall label the trademark smith - portla co， ltd. on the contracted products so produced.7.2nameplates， quotations， technical specifications， advertisement， instruction manuals， samples of the contracted products manufactured by part a shall all be labelled with the name of part a.article 8 packing8.1packing shall be in the form of strong wooden case (s) suitable for long voyage and well protected against dampness， moisture， shock， rust and rough handling. the seller shall be liable for any damage to the goods and extra expenses due to improper packing， inadequate or improper protective measures.8.2the package number， measurements， gross weight， net weight， the words "keep away from moisture"and the following shipping marks shall be printed with fadeless paint on each package:
(1)part b/part a 12v - 400zc
(2)part b/part a12v- 600zc8.3packing list in duplicate indicating gross and net weight，measurements and quantity of each item is included.article 9 force majeure9.1should either party of the contract be prevented from implementing the contract by such cases of force majeure as war， serious fire， flood， typhoon and earthquake， or other events confirmed by both parties， the time for implementing the contract shall be extended by a period equal to the effect of such force majeure.9.2the party concerned shall notify the other party by cable within the shortest possible time after occurrence of the force majeure and send by registered airmail within 14 (fourteen) days to the other party a certificate issued by relevant authorities for confirmation.9.3should the effects of force majeure continue for more than 120 (one hundred twenty) consecutive days， both parties shall settle further execution of the contract through friendly negotiations as soon as possible.article10 arbitration10.1all disputes relating to the contractor arising from the execution of the contract shall be setfled through friendly consultations between both parties. should no settlemnt be reached， the disputes shall be submitted to arbitration.10.2the arbitration shall take place in stockholm， sweden， and be conducted by the arbitration institute of the stockholm chamber of commerce.10.3the arbitration award shall be final and binding on both parties.10.4the arbitration fee shall be borne by the losing party except otherwise awarded by the arbitration institute.10.5in the course of arbi. tration， the contract shall continuously be executed by both parties except for the part which is under arbitration.article 11 effectivenessof the contract and miscellaneous11.1this contract is formally signed by the representatives of both parties in_________/ (place) on_________， and shall be approved by the relevant authorities within one week to become effective.11.2this contract shall be written in english in four copies. each party shall keep two copies.11.3the duration of the contract is stipulated in art. 11.11.4appendix to the contract shall form an integral part of the contract and shall have the same binding force as the contract itseff.11.5all documents， letters， telegrams and telexes interexchanged between both parties before the signing of the contract shall become null and void automatically from the date on which the contract comes into force.11.6this contract can only be altered， amended and supplemented in accordance with the documents which have been signed or stamped by the authorised representatives of both parties.11.7letters， telegrams and telexes shall be used for communication between both parties during the contracted period. letters shall be in duplicates.article 12 legal addresses parta(address)：
_________partb(address)：
_________party a(signature)：
_________ party b(signature)：
_________date:_________ date:_________