求翻译：阀门出厂时，每台阀门应有合格证，每批阀门应随带产品合格证明书、装箱单、产品检验和试验报告（合同规定时），材料质量证明书（合同规定时），产品说明书（合同规定时）等有关技术，固定在箱内某一部位。是什么意思？

Valve factory, each valve should have certification, each batch of valves should be shipped with a certificate of compliance to the product, packing lists, product inspection and test report (the contract), the material quality certificate (contract), product brochures ( contract) and other related

valves at the factory, each valve should have certification, each batch comes with valve should product certificates of competency, packing slip, product testing and test report (contract), the material provisions (certificate of quality contract provisions, the product instructions for use (such as

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Valve factory, each valve should have certificates, each batch of valve that comes with the product certificate, packing list, product inspection and test report (contract), materials quality certificate (contract), the product specifications (contract provisions) and other related technologies, fix

When the valve leaves the plant, each deck valve gate should have the certificate, each batch of valves should accompany the product qualified certificate, the packing list, the product examination and the test report (when contract provision), material quality certificate (when contract provision),