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當承受地(di)震作用(yong)時,應采(cai)用(yong)雙(shuang)螺母固定,或采(cai)用(yong)其它(ta)有效(xiao)防止松動的措施,但地(di)腳螺栓...
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單(dan)頭(tou)螺栓(shuan)(shuan)與雙頭(tou)螺栓(shuan)(shuan)區別(bie),35crmoa雙頭(tou)螺栓(shuan)(shuan),國標35CrMoa雙頭(tou)螺栓(shuan)(shuan),...
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