8.8级双头螺栓半螺纹螺柱高强度螺栓发黑碳钢螺栓双头双头螺丝
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8.8级双头螺栓半螺纹螺柱高强度螺栓发黑碳钢螺栓双头双头螺丝，批发价，价格：0.25，厂家直销，8.8级双头螺栓半螺纹螺柱高强度螺栓发黑碳钢螺栓双头双头螺丝，免费拿样。