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俺跟人家說(shuō),在中國(guó),,只能做好你自己,, |
點(diǎn)評(píng)
小螺栓,,一般擰過(guò)載了,就是‘拉-剪’結(jié)合的,,斷口有角度的,,大概20-30度,基本是‘拉斷’,,平斷口的,,是‘剪切斷裂’,有潤(rùn)滑的擰緊,,一般斷口有‘收縮’,,高強(qiáng)螺栓,斷口基本沒(méi)有收縮,,
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