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膨胀螺丝m10钻多大孔承重拉拔力型号规格一览图
广义上螺栓包括普通螺栓,高强螺栓,地脚锚栓,膨胀螺栓,化学锚栓,螺钉
定制工程镀锌膨胀螺丝加长铁膨胀螺栓拉爆螺丝6m8m10m12m14m16m18定做
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