σφράγιση : 49 phrases in 14 subjects |
Communications | 3 |
Construction | 2 |
Customs | 1 |
Earth sciences | 1 |
Electronics | 4 |
Environment | 2 |
Finances | 3 |
Fish farming pisciculture | 1 |
General | 1 |
Industry | 1 |
Materials science | 26 |
Mechanic engineering | 2 |
Medical | 1 |
Transport | 1 |