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承插類(lèi)管件

日期：2011-03-03 16:16:12【點(diǎn)擊：87】

承插管件是指將一管插入另一管端的插套,在環(huán)隙內先填麻絲或石棉繩,再塞入膠合劑(如水泥,耐酸膠泥...

合金鋼異徑管

日期：2011-03-03 16:04:25【點(diǎn)擊：198】

合金鋼異徑管(大小頭)管件其管件材質(zhì)的特點(diǎn)為這類(lèi)鋼是一種低碳結構用鋼,合金元素含量較少,一般在...

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国产精品一卡二卡三卡

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