共 2 条
- [1] Distribution of Rock Breakup Energy Indices Over the Working Surface of Cutting and Shearing-type Bits. Izvestia vyssih ucebnyh zavedenij. Neft i gaz, 1981, (02): : 15 - 18
- [2] TESTING MODIFIED COAL-CUTTING BIT DESIGNS FOR REDUCED ENERGY, DUST, AND INCENDIVITY. Report of Investigations - United States, Bureau of Mines, 1983,