9519| 20
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無縫鋼管焊接后,長度會縮短3-5mm,為什么? |
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回復(fù) 3# 的帖子
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回復(fù) 7# 的帖子
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小黑屋|手機(jī)版|Archiver|機(jī)械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,浙公網(wǎng)安備33038202004372號 )
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