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螺絲都不會選,還能做設計?! |
點評
破壞力矩和拉力是2回事,按8.8級螺栓許用強度530MPa計算,大概能承受拉力600kg。可能是我記錯了是M5的螺栓,或者他們用的是高強度的不銹鋼,螺栓不止8.8
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