质 谱 法 : 262 phrases in 22 subjects |
Agriculture | 4 |
Animal husbandry | 1 |
Automobiles | 4 |
Aviation | 1 |
Chemistry | 9 |
Earth sciences | 51 |
Ecology | 2 |
Electronics | 63 |
General | 3 |
Geology | 30 |
Laboratory equipment | 1 |
Metallurgy | 6 |
Name of organization | 2 |
Oil / petroleum | 3 |
Oil processing plants | 2 |
Polymers | 2 |
Shipbuilding | 2 |
Space | 8 |
Sports | 1 |
Steel production | 1 |
Technology | 41 |
Water resources | 25 |