engineering driller meaning in Chinese
工程钻机
Examples
- The practice amp; improvement of refit head dual channel reverse circulation main shaft about g - 3 engineering driller
3工程钻机动力头双通道反循环主轴改装实践 - The practice amp; amp; improvement of refit head dual channel reverse circulation main shaft about g - 3 engineering driller
3工程钻机动力头双通道反循环主轴改装实践