| |||
fencing and supervision | |||
protection works | |||
prevention engineering | |||
flood protection works |
防护 工程 : 29 phrases in 11 subjects |
Agriculture | 1 |
Bridge construction | 4 |
Desert science | 1 |
Earth sciences | 1 |
Ecology | 1 |
Economy | 1 |
Engineering geology | 2 |
Hydroelectric power stations | 5 |
Rail transport | 1 |
Space | 1 |
Technology | 11 |