The successful development of this drilling machine provided reliable safety equipment for drilling shallow engineering hole such as outburst-prevention holes and flank holes in coal mine.
钻机的研制成功为煤矿实施防突孔和校检孔等一些浅孔施工提供了可靠的安全装备。
2
A demanding hole which can be made even more difficult by a tough pin placement. Beware of the out-of bounds on the right flank.
富有挑战性的球洞，如果果岭球洞位置刁钻的话，难度会更高。提防把球打出右方界外。
3
The Mouse peeping out, crept furtively up his flank, and, again biting him, retreated to his hole.