cross roller bit 纵横交替轧片法
Rock Roller Bit 牙轮钻头
cross bit 十字钻头; 十字形钻头; 十字形刀尖器
cross bit x 形钻头
Cross Roller Bearing 经颅多普勒(TCD); 交叉滚子轴承
Rock Cross-cut 石门揭煤
Rock Cross-cut Coal Uncovering 石门揭煤
single roller cross 单辊交叉
bit roller 匙形钻头; 非达西流; 滚筒钻锥
cone type roller bearing rock bit 滚柱轴承锥形牙轮钻头
four roller bit 四牙轮钻头
Reed roller bit 瑞德牙轮钻头
ROLLER BIT 辊链; 牙轮钻头; 滚子链; 滚齿钻头; 旋转钻头
roller bit drilling 牙轮钻头钻进
roller rock arm 滚轮摇臂
roller-bit hole rig 牙轮钻机
THREE ROLLER BIT 三牙轮钻头
two-roller bit 双牙轮钻头
bit rock 滚动式钻头; 滚齿钻头; 无触点; 岩石钻锥