noun
boring machine; borer
A machine tool used to enlarge or finish holes in metal or other materials. Technical term in machining.
工場で中ぐり盤を使ってエンジンブロックの穴を仕上げる。
They use a boring machine at the factory to finish the holes in the engine block.
Compound of 中ぐり (nakaguri, 'boring', from 中 'inside' + 刳る 'to hollow out') + 盤 (ban, 'machine, board').