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The pressure and temperature of the low-pressure pipe and high-pressure pipe can be tested in a refrigeration system. Blue arrow "LOW" for low-pressure rotary switch, red arrow "HIGH" for high-pressure rotary switch.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.