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當(dang)承受地震(zhen)作用(yong)(yong)時(shi),應采用(yong)(yong)雙螺(luo)母固定,或采用(yong)(yong)其它有效防止(zhi)松(song)動的措(cuo)施,但地腳螺(luo)栓(shuan)...
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單(dan)頭螺(luo)栓與雙頭螺(luo)栓區別,35crmoa雙頭螺(luo)栓,國標(biao)35CrMoa雙頭螺(luo)栓,...
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