Taper the plug off a bit with the chisel so that it will fit into the hole.
用凿子把塞子的一头削掉一点，使它能塞进洞里。
2
Taper the plug off a bit with a chisel so that it will sit into the hole.
用凿子把这塞子一头削尖点，使它能塞进孔里。
3
Simultaneously, bit stability is enhanced using multiple bit stable structure design techniques such as deep inner taper, force balance and hybrid cutter arrangement etc.