| |||
compressed air hammer | |||
air-driven hammer; air ram | |||
pneumatic rammer | |||
air hammer; air rammer; compressed-air hammer; pneumatic pick; pneumatic hammer |
风 动 锤 : 20 phrases in 5 subjects |
Bridge construction | 2 |
Engineering geology | 2 |
Metallurgy | 7 |
Shipbuilding | 1 |
Technology | 8 |