发布时间:2025-02-02 04:36:09
1、180°弯头按表2倍计算,45°按1/2计算;
2、R1.0DN弯头重量按表2/3计算;
3、90°弯头计算公式:
0.0387*S(D-S)R/1000
式中S=壁厚mm、D=外径mm、R=弯曲半径mm
90°弯头R=1.5D,及弯头的中心高度A=R=1.5*25.4*NPS。
衬塑弯头、UPVC弯头 不知道
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2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09最近一个月在床上和地上发现这种小虫求大神鉴定这什么虫求治疗消灭23毫米深棕色硬壳
2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09 2025-02-02 04:36:09