| |||
| 初始压力; 预压力 | |||
| 初始压缩 | |||
|
initial compression : 4 phrases in 3 subjects |
| Hydroelectric power stations | 2 |
| Rail transport | 1 |
| Sealing | 1 |
| |||
| 初始压力; 预压力 | |||
| 初始压缩 | |||
|
initial compression : 4 phrases in 3 subjects |
| Hydroelectric power stations | 2 |
| Rail transport | 1 |
| Sealing | 1 |