预埋螺栓规格,预埋螺栓规格型号

gb799地脚螺栓/7字型l型预埋螺栓/9字型地脚螺丝m12m16m20m24m30 m10*
厂家订做各类地脚螺栓7字9字地脚螺丝预埋地脚螺栓弯钩螺栓
gb799地脚螺栓预埋螺栓9字地脚螺丝m12m16m20m24m30m36m42m48
厂家订做预埋板地脚螺栓碳钢焊板地脚螺丝4.8级预埋螺栓
预埋地脚螺栓高强螺丝单双头双头热镀镀锌m20m24m27m30m32螺栓