8 1/2 英寸 IADC617 单牙轮钻头 用于非开挖用牙轮钻头
钻头尺寸 8 1/2"(215.9MM)
617型
应用
适用于HDD工程开孔器
特点 1. 增强耐磨规保护，增加工作寿命。
2.耐高温橡胶密封轴承。
3. 碳化钨保护的衬衫尾
4. 14mm锥形刀片，更高的耐磨性钻头快速
5、适用岩石硬度：≥100Mpa
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