2474| 11
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請(qǐng)教鋼絲繩夾U型螺栓為什么一定要扣在尾段上 |
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點(diǎn)評(píng)
要定期檢查螺栓是否松動(dòng)
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點(diǎn)評(píng)
這是表達(dá)不清哈哈哈,一般都說(shuō)把釘子訂到木板上,沒(méi)有說(shuō)把木板釘?shù)结斪由,一是有個(gè)主次的問(wèn)題,二是有個(gè)被打擊對(duì)象的問(wèn)題,被打擊對(duì)象一定是局部受力大的那一個(gè),也就是變形大。那么想尾段變形大還是主體受力大呢
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