| |||
digital recording equipment | |||
digital recorder |
数字 记录仪 : 25 phrases in 10 subjects |
Aviation | 4 |
Earth sciences | 5 |
Electronics | 6 |
Explosives and Explosive Ordnance Disposal | 1 |
Geology | 1 |
Geophysics | 3 |
Mechanics | 1 |
Mining | 2 |
Oil / petroleum | 1 |
Technology | 1 |