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錐形鋼管 使用范圍|矩形管每米重量

文章出處:http://bmhykj.cn 人氣:20發(fā)表時間:2018/7/23 13:41:14
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*指平直邊的外部尺寸**特性是根據(jù)外圓角公稱半徑等于壁厚的兩倍計算的。

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