| 1. | The separator is equipped with a sight glass through which a boundary line of the liquid phases can be observed .
分离器设有窥视镜，通过它能够视察液间的分界线。 |
| 2. | Circular sight glasses with case in main power connection
主动力连接中的有罩圆形观察孔 |
| 3. | The investigation into the senior students wearing near - sighted glasses
对高中学生近视情况的调查 |
| 4. | Shipbuilding - cylindrical sight glasses
造船.圆筒式观察玻璃 |
| 5. | Sight glasses for pressure vessels
压力容器用观察镜 |
| 6. | Shipbuilding - flat sight glasses
造船.平板观察玻璃 |
| 7. | Circular sight glasses with case in metal to metal contact type flanged joint
金属与金属接触式法兰连接中的有罩圆形观察孔 |
| 8. | Circular sight glasses
圆形显示镜片 |
| 9. | The sighting glass and chain have been installed on the door of each room for your safety
每个房间都安装了窥视镜和保险链，以确保安全。 |
| 10. | Pressure resistant circular glass - to - metal fused sight glasses - part 1 : for holders with recess
抗压力的圆形玻璃金属熔融观察镜.第1部分:用于带槽 |
