形 螺 纹 : 134 phrases in 21 subjects |
Architecture | 2 |
Automobiles | 9 |
Aviation | 5 |
Business | 1 |
Dermatology | 1 |
Drilling | 10 |
Earth sciences | 1 |
Electric machinery | 1 |
Explosives and Explosive Ordnance Disposal | 1 |
General | 7 |
Mechanics | 5 |
Metallurgy | 7 |
Nautical | 1 |
Oil / petroleum | 22 |
Plastics | 6 |
Refrigeration | 1 |
Shipbuilding | 1 |
Space | 1 |
Technology | 47 |
Textile industry | 4 |
Wind Energy | 1 |