4093| 8
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雙頭螺柱聯(lián)結(jié)比螺栓防松效果好 |
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點(diǎn)評(píng)
預(yù)緊力小的情況確實(shí)增加了一個(gè)松動(dòng)點(diǎn),,預(yù)緊力達(dá)到一定值,,雙頭螺栓的防松作用不給它松動(dòng)的機(jī)會(huì)
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