中华人民共和国经济合同法（节选）第二章经济合同的订立和履行第十七条购销合同（包括供应、采购、预购、购销结合及协作、调剂等合同）中产品数量、产品质量和包装质量、产品价格和交货期限按以下规定执行：二、产品质量要求和包装质量要求，有国家强制性标准或者行业强... Economic Contract Law of the People's Republic of China (Excerpt) Chapter II Establishment and Implementation of Economic Contract Article 17 The quantity, product quality and packaging quality of the purchase and sale contracts (including contracts for supply, purchase, pre-order, purchase and sale, and coordination and adjustment) , Product prices and delivery deadline according to the following provisions: Second, product quality requirements and packaging quality requirements, there are mandatory national standards or industry strong ...