求翻译：2.2 关闭预混锅底部排水管路阀门，开启需要清洗管路的预混锅进料阀门，待去离子水管路完全注入热水时，关闭预混锅进料阀门；是什么意思？

2.2 Close the Ministry of premixed bottom drain line valve, open the pot needs cleaning premixed feed pipe valve, to be completely de-ionized water pipeline into the water, close the valve premixed feed pan;

2.2 * the closing down of pre-mixed-cavity drain valves, open road needs the pre-mixed pot washing line feed valves to be deionized water pipes, hot water, road closure is fully injected pre-mixed pot feed valve;

2.2 The closure mixes the pot base drain line valve in advance, opening needs to clean the pipeline to mix the pot feeding valve in advance, treats when completely the deionized water pipeline pours into the hot water, the closure in advance mixes the pot feeding valve;

2.2 closing premixed pot drainage system valves at the bottom, turn on the require washing lines of premixed feed valve, deionized water pipes completely into hot water, close the premixed boiler feed valves;

2.2 closing premixed pot drainage system valves at the bottom, turn on the require washing lines of premixed feed valve, deionized water pipes completely into hot water, close the premixed boiler feed valves;