7017| 12
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請問動(dòng)梁龍門結(jié)構(gòu)的橫梁和立柱用焊接的好,,還是鑄造的好呢,? |
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小黑屋|手機(jī)版|Archiver|機(jī)械社區(qū) ( 京ICP備10217105號(hào)-1,,京ICP證050210號(hào),浙公網(wǎng)安備33038202004372號(hào) )
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