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原机械部JB /T4707-2000 JB4707 4707JB(JB4707- 等长双头
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原机械部JB /T2774-1992 JB2774 2774JB(JB2774- 阶端双头
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电力标准DL /T1236-2013 DL1236 1236DL 双头型地脚螺栓
8.8级 45钢-HG20613双头螺柱 东螺不锈钢螺丝生产厂家双头螺柱产品全名:8