With the rise of groundwater level and continue to gather large amounts of water were Stop outside the waterproof layer of the pyramid, and the vent will penetrate through the part of water to come.
Before feeding water, air vent valves, pressure gauge valve, water level gauge, burner supply valve and steam supply valve should be opened fully. Other valves and checking manhole close.
上水时，空气阀、压力表阀及水位计通汽通水阀开足，其他阀门和检查门无孔门应一律关闭。
3
When the vent opening reduces, the jet flow phenomenon is not obvious, and an obvious process of liquid level dropping could present.