发布时间:2025-01-19 17:01:18
以下为pvc软管配方,供参考:
聚氯乙烯树脂:100;
DBP:10;
环氧增塑剂:5;
硬脂酸钡/镉:1;
DOP:30;
己二酸二辛脂:5;
有机锡:1.5
我在地铁开手机配件店同站地铁做贴膜的就5家竞争很激烈我该如何脱颖而出呢
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