发布时间:2025-01-31 13:43:38
玛钢管件,就是可锻铸铁管件,管螺纹连接,承压能力不超过1.6MP,一般自喷里用的就是(80以下的管件)。沟槽管件最大工作压力可达2.8MPa,远高于镀锌管和螺纹管件的工作压力,在消防给水中完全能用。但造价高些。机械管件,三通,四通那些,是在主管上挖洞,把支管接上去就行了,分丝接和沟槽(卡箍)的。
最近想买地板瓷砖请问马可波罗瓷砖圣象地板大自然地板哪个好有没有团购活动
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