发布时间:2025-02-05 22:13:28
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)....
你好我想做墙纸生意有看你之前的回答知道你有做过想请教我要如何入此行
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