...究-中国包装论文库 关键词：金属包装材料；划痕法；涂层／基底体系；有限元模拟 [gap=673]Key words: metal packaging materials; scratch test; coating/substrate system; finite element modeling ..
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Compliance may shown by testing the packaging or based on calculations from heavy metal testing of the packaging materials.
通过检测或基于从包装材料重金属检测计算出的结果显示出对指令的符合性。
However, the main structure of plastic flexible packaging materials are plastic polymers, has some permeability to gas, and therefore can not fully replace the metal and glass packaging.
然而塑料软包装材料主体结构是塑料聚合物，对气体有一定的渗透性，因此并不能完全代替金属、玻璃包装。
Now form the food processing industry, packaging products, fabricated metal products industry, building materials, such as industry-oriented pattern of non-public enterprises.
现已形成食品加工业、产品包装业、金属制品加工业、建材业等为主的非公有制企业格局。
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