1S密封液排氣孔接口seal liquid vent

2S排氣孔vent

3S漏液（yè）排出孔leakage liquid drain

4S壓力表（biǎo）pressure gauge

5S排水孔（kǒng）drainage

6S密封（fēng）液（yè）進口seal liquid suction

7S密封液出口（kǒu）seal liquid drain