发布时间:2025-01-31 00:44:42
300mm-350mm。
根据GB/T3091-2001标准,dn100钢管的公称直径是100毫米,需要12寸或14寸左右的,即长度为300mm或350mm的管钳,方可夹住。
Dn100钢管主要是用于水利市政管道的工程中,字母“dn”是表示管道的公称通径。
我想问一下古代青铜酒杯现在价值多少。三个爪两头翘看似鼎的酒杯!
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