高速牙轮钻头轴承的失效分析。
它改变了牙轮钻头直径校核的传统设计顺序。
It has changed the traditional design order in checking the diameter of bit.
保证三牙轮钻头的直径是钻头制造工艺的重点。
Diameter controlling is of great importance in rock bit manufacturing.
保证三牙轮钻头的直径是钻头制造工艺的重点。
Diameter controlling is of great importance in rock bit manufacturing.
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