| |||
| 掩护支架采煤法在急斜煤层中，沿走向布置采煤工作面，用掩护支架将采空区和工作空间隔开,向俯斜推进的采煤方法; 掩护筒法在不稳定地层中,先顶人金属筒体，而后在其掩护下进行井巷施工的方法 | |||
| ★ 盾构法 | |||
| ★ 掩护筒法; 盾盖式开采法 | |||
|
shielding method : 3 phrases in 3 subjects |
| Hydroelectric power stations | 1 |
| Nuclear physics | 1 |
| Technology | 1 |
| |||
| 掩护支架采煤法在急斜煤层中，沿走向布置采煤工作面，用掩护支架将采空区和工作空间隔开,向俯斜推进的采煤方法; 掩护筒法在不稳定地层中,先顶人金属筒体，而后在其掩护下进行井巷施工的方法 | |||
| ★ 盾构法 | |||
| ★ 掩护筒法; 盾盖式开采法 | |||
|
shielding method : 3 phrases in 3 subjects |
| Hydroelectric power stations | 1 |
| Nuclear physics | 1 |
| Technology | 1 |