5023| 7
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那位大俠知道直徑20mm ,,厚度1.5mm的不銹鋼管的耐壓值,?,? |
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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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