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當承受地震作用(yong)(yong)時,應采(cai)用(yong)(yong)雙螺(luo)母(mu)固定,或采(cai)用(yong)(yong)其它有效防(fang)止松動的措施,但(dan)地腳螺(luo)栓...
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u型(xing)螺(luo)栓規格型(xing)號表,gb4321標(biao)準u型(xing)螺(luo)栓,8.8級u型(xing)螺(luo)栓生產公司,懸挑...