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Some questions about the product

1 Why is a transformer used?
2 What is transformer in GPT?
3 What is transformer mainly used for?
4 What happens when high pressure switch goes bad?
5 Should high pressure switch be open or closed?
6 Should high pressure switch be open or closed?
7 Are low pressure switches normally open or closed?
8 What is the difference between normally open and normally closed pressure switches?
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