roller cone bit 牙轮钻头
multiple-roller cone machine 多牙轮钻井机
roller-cone core bit 牙轮岩心钻头
roller-cone bit 牙轮钻头
roller cone machine 多牙轮钻井机
roller cone drilling 牙轮钻进
vertical roller cone angle 立辊锥角
steel tooth roller cone bit 钢齿牙轮钻头
This tend is weaken with increase of vertical roller cone Angle.
翼缘的宽展量随立辊锥角的增加而减小。
Proper design of roller cone angle of smooth rolling is the key to obtaining a high accurate wall thickness.
斜轧穿孔机轧辊形状设计十分重要，其中辗轧锥角的正确设计是获得高精度壁厚的关键。
On the basis of many experiments, the mechanics model for the interaction of roller cone bit and rock was established.
在大量单元实验的基础上，建立了牙轮钻头与岩石相互作用力学模型。
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