6464| 13
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求關(guān)于螺栓松動(dòng)的試驗(yàn)方案,急! |
評(píng)分
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點(diǎn)評(píng)
實(shí)驗(yàn)螺栓各種性能,比如道軌螺栓,跑什么速度會(huì)松?松一個(gè)就是驚天大禍,
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點(diǎn)評(píng)
能精確設(shè)定的,就可以,
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