发布时间:2025-02-05 22:00:39
伟星PE管材
按原料分为PE80和PEPE100,PN表示水管公称压力,SDR表示外径与壁厚之比。。
比如PE 80 PN0,.4 SDR21 D110*18.5(110表示外径,18.5表示壁厚)....
我在一个厂里上班在一个师傅下学徒师傅刚开始说的很好听说会怎么怎么教我但是都没怎么教问了师
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