English Dictionary

pilot hole

名詞

A narrow hole drilled or punched into a surface, to facilitate the insertion of a wider screw, nail, drill bit, or other boring tool.

日本語の意味

広いネジ、釘、ドリルなどの工具がスムーズに挿入できるように、あらかじめ表面に開ける狭い穴（下穴） / 工具の挿入や固定を容易にするために、事前にあける細い穴

Before inserting the screw, drill a small pilot hole to prevent the wood from splitting.

ねじを入れる前に、木が割れるのを防ぐために小さな下穴を開けてください。

意味（1）

A narrow hole drilled or punched into a surface, to facilitate the insertion of a wider screw, nail, drill bit, or other boring tool.

During the sinking of the last 150 feet, a pilot-hole was kept in advance, so as to prevent any unforeseen inrush of water.

pilot holes （ plural ）