求翻译：1.2 开启所需要清洗的预混锅进料阀门，开启计量罐的手动输料，将去离子水泵入预混锅，并清洗输水管道；是什么意思？

1.2 on the pot needs cleaning premixed feed valve, open the manual measurement can lose material, will be pre-mixed into the deionized water pump pot, and clean water pipelines;

1.2 The need to clean up the pre-mixed pot feed valve, opening the metering information manually, will go to visit the pre-mixed pot ion pumps, and cleansing aqueduct;

1.2 opening needs to clean mixes the pot feeding valve in advance, opens the flow tank manually to lose the material, enters the deionized water pump mixes in advance the pot, and cleans the water distribution pipeline;

1.2 open needs to be cleaned of premixed feed valve, open the manual is expected to lose to measuring tank, deionized water pump premixed into the pot, and clean the water pipelines;