| |||
operational security | |||
job safety | |||
work safety |
作业 安全 : 23 phrases in 12 subjects |
Aviation | 1 |
Business | 2 |
China | 1 |
Drilling | 1 |
Electronics | 2 |
Environment | 1 |
Explosives and Explosive Ordnance Disposal | 2 |
Geophysics | 1 |
Name of organization | 2 |
Navigation | 1 |
Space | 2 |
Technology | 7 |