rock roller bit的例句大全

The coupling function analysis of the thread-locking ring of rock roller bit

牙轮钻头螺纹锁紧环连接性能影响分析

Study on Roller Bit Rock-Breaking Power in Vertical Wells

直井牙轮钻头碎岩功率研究

Analysis of the side-wall pattern shows that the side-cutting process of the roller bit is related to not only the teeth surface design but also the rock property and the drilling parameters.

井壁模式分析说明，牙轮钻头的侧向切削过程不仅与齿面结构有关，而且与岩石性质、钻井参数有关。

Carbide welded taper shank core drill cone type roller bearing rock bit

硬质合金焊接式锥柄扩孔钻滚柱轴承锥形牙轮钻头

Cone type roller bearing rock bit The tapered gear box and universal shaft transmit smooth power and are simple to assemble and disassemble.

滚柱轴承锥形牙轮钻头锥齿轮箱＋万向轴动力上台，传动可靠，装拆方便。

Research onto the crowned design of rock bit cylindrical roller bearing

牙轮钻头圆柱滚子轴承的凸度设计研究