发布时间:2025-02-05 22:04:14
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)....
这个是微波炉变压器的输出端哪位大神能告诉我哪个是零线哪个是火线
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