849| 4
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鋁閥塊M68x2內(nèi)螺紋在7牙是否能承受30Mpa |
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點(diǎn)評(píng)
也行,你也可以用標(biāo)準(zhǔn)單位 Pa m 等標(biāo)準(zhǔn)單位,需要換算下
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