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當(dang)承(cheng)受(shou)地震作用時,應采(cai)用雙(shuang)螺(luo)母固定(ding),或采(cai)用其它有(you)效防止松動(dong)的措施,但地腳(jiao)螺(luo)栓...
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u型螺栓(shuan)規格型號表,gb4321標(biao)準u型螺栓(shuan),8.8級(ji)u型螺栓(shuan)生產公(gong)司(si),懸(xuan)挑...