楼主: shgwjh
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[求助] 20#(GB3087)材料,用于给水管道,最高压力能用到多少??? |
发表于 2012-6-24 20:05:39
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发表于 2015-5-29 08:40:27
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发表于 2015-10-12 11:02:58
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