failed hole

• 已失效的炮眼,不爆炮眼

failed hole的用法和样例：

例句

1. Since the crater-hole breakage is of great importance, it can be advisable to use a larger drill hole than the others in the raise.
   由于漏斗炮眼的爆破效果非常重要，故天井爆破宜采用较大的炮眼直径。
2. The plastic hose should have the correct external diameter in relation to the drill hole.
   塑料软管的外径应该与炮眼直径相适应。
3. The explosive from the lorry is delivered to the shot hole by means of a compressed air.
   从卡车上直接用压缩空气将炸药装入炮眼。