guide hole

• 导向孔,超前炮眼,导孔

guide hole的用法和样例：

例句

1. 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。
2. 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。