发布时间:2025-02-05 22:16:20
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)....
为什么有的人的手艺好人家装潢公司的老板亏本给他23倍的价格包给他干为什么
2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20发现新房埋入地面有黑色的管子露在外面因为是地暖也不知是否合格
2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20 2025-02-05 22:16:20