(资料图片)
1、 方形钢管简称方钢管又叫方管，是方形管材的一种称呼，也就是边长相等的的钢管。
2、是带钢经过工艺处理卷制而成。
(资料图片)
1、 方形钢管简称方钢管又叫方管，是方形管材的一种称呼，也就是边长相等的的钢管。
2、是带钢经过工艺处理卷制而成。
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