 |
| |||
| safety barriers (控制地层流体和压力的压井液及井下、井口设备) | |||
| safety barrier (防辐射用的装置) | |||
| safety curtain | |||
| security screening | |||
| |||
| safety wall | |||
| 安全屏障: 3 phrases in 2 subjects |
| Electronics | 2 |
| Rail transport | 1 |
|
| |||
| safety barriers (控制地层流体和压力的压井液及井下、井口设备) | |||
| safety barrier (防辐射用的装置) | |||
| safety curtain | |||
| security screening | |||
| |||
| safety wall | |||
| 安全屏障: 3 phrases in 2 subjects |
| Electronics | 2 |
| Rail transport | 1 |