a pneumatic drill的用法和样例：
- When a student recently saw two workmen using a pneumatic drill outside his university,he immediately telephoned the police.
- He immediately telephoned the police and informed them that two students dressed up as workmen were tearing up the road with a pneumatic drill.
- The retiring miner delivered his pneumatic drill over to his successor.
- A projecting rim or lip,as on a pneumatic tire.
- A projecting rim or lip, as on a pneumatic tire.