Singlepass drilling apparatus, use a one-piece drill bit, method and rock bolt for singlepass rock bolting.
单通道钻孔装置，整个钻头的使用，用于单通道岩石锚固的方法和岩石锚栓。
2
Singlepass laser surface of the specimens using powder feeding method were obtained by varying the powder feeding rate and the preheating temperature of the substrate.
通过改变送粉激光熔覆过程中的扫描速度、送粉速率、基体预热温度等工艺参数，获得了单道激光熔覆层。
3
Based on this idea, a new designing method of singlepass and continuous rolling pass have been inquired.