发布时间:2025-01-21 06:27:00
分和寸表示钢管的公称通径,这个和MM有对照表,你如果换算的话是算不出来的,比如114的钢管,是四寸的,一英寸是25.4 ,换算出来是101.6,。您在网上找一下,钢管英寸对照表,
中央空调计量计是如何收费的是以吨为单位还是以平方或者立方为单位的
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