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显示印刷效果的轮廓图 |
type mechanical : 42 phrases in 14 subjects |
Architecture | 1 |
Automobiles | 2 |
Aviation | 1 |
Business | 1 |
Chemistry | 2 |
Compressors | 2 |
Drilling | 1 |
Geophysics | 1 |
Metallurgy | 5 |
Nautical | 1 |
Oil / petroleum | 3 |
Refrigeration | 1 |
Space | 1 |
Technology | 20 |