衰减系 数 : 47 phrases in 15 subjects |
Automobiles | 3 |
Cartography | 1 |
Earth sciences | 2 |
Ecology | 1 |
Electronics | 3 |
Explosives and Explosive Ordnance Disposal | 1 |
Geophysics | 1 |
Hydroelectric power stations | 2 |
Life sciences | 1 |
Oil / petroleum | 6 |
Plastics | 2 |
Refrigeration | 1 |
Space | 2 |
Statistics | 1 |
Technology | 20 |