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bearing scale |
位度盘 : 30 phrases in 10 subjects |
Automated equipment | 1 |
Aviation | 1 |
Electronics | 1 |
Engineering geology | 1 |
Explosives and Explosive Ordnance Disposal | 1 |
Oil / petroleum | 2 |
Skydiving | 2 |
Space | 1 |
Technology | 18 |
Telecommunications | 2 |