on duty
相关英语词汇推荐
- gravity meter
- vacuum lock
- oil heater storage tank
- hard drawn copper wire
- inhibitory action
- steam circulating pipe
- Warp Beam
- leading-out
- value control amplifier
- autosynchronous
- intermediate-base resin
- adjustment of itself
- pneumatic remote control
- maximum permissible pressure
- relay satellite
- bog
- effective projected radiant surface
- pending the issuance of licence
- normal condition
- Quadrature components