防 护板 : 86 phrases in 17 subjects |
Architecture | 2 |
Automobiles | 17 |
Aviation | 2 |
Bridge construction | 2 |
Business | 1 |
Chemistry | 1 |
Dermatology | 1 |
Electric machinery | 1 |
General | 1 |
Mechanic engineering | 1 |
Metallurgy | 6 |
Oil / petroleum | 1 |
Plastics | 1 |
Rail transport | 1 |
Skiing | 1 |
Space | 1 |
Technology | 46 |