Once all the holes are bored, square the ends and the sides of the mortise with a chisel (Photo 15).
2
为了使凿刀和刨子好用且安全,必须保证他们的刃足够锋利。
Keeping a sharp edge on chisels and plane irons is absolutely necessary for the successful and safe use of these tools.
3
必须安装保险夹或护圈,以防止配件(如气錾的凿刀)从凿筒中意外飞出。
A safety clip or retainer must be installed to prevent attachments, such as chisels on a chipping hammer, from being unintentionally shot from the barrel.