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當承受地震作(zuo)用(yong)時,應采(cai)用(yong)雙(shuang)螺母固定(ding),或采(cai)用(yong)其它(ta)有效防止(zhi)松動的措(cuo)施,但地腳(jiao)螺栓...
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u型(xing)螺栓(shuan)(shuan)規(gui)格型(xing)號表,gb4321標準(zhun)u型(xing)螺栓(shuan)(shuan),8.8級(ji)u型(xing)螺栓(shuan)(shuan)生產公司,懸挑...