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双向拉伸聚丙烯(BOPP)/低密度聚乙烯(LDPE)复合膜、袋
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塑料薄膜和薄片气体透过性试验方法 压差法
Plastics-Film and sheeting-Determination of gas transmission-Differential-pressure method
价格:¥0.00
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农用薄膜产品质量监督抽查实施规范
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食盐小包装制作技术规范
Technical specifications for edible salt packaging making
价格:¥0.00
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