nibbed countersunk head bolt的意思|示意
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尖口沉头螺栓
nibbed countersunk head bolt的网络常见释义
带榫沉头螺栓 ... nibbed bolt 尖头螺栓 nibbed countersunk head bolt 带榫沉头螺栓 nibbed sagger 内有凸齿的匣钵 ...