4. drill hole在线翻译
\u0077\u0077\u0077\u002e\u0071\u0069\u0063\u0061\u0069\u002e\u006e\u0065\u0074
2. 七彩网单词·英语单词
4. drill hole的意思
1. a hole or passage made by a drill usually made for exploratory purposes
Synonym: borebore-hole
