Refrigeration System And Cold Rooms - In Refrigeration Systems Sight Glass Is An Excellent Tool And Can Be Relied Upon As An Indicator Of Liquid Refrigerant To The Metering Device. The Moisture
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Amazon.com: Refrigerant sight glass SGN6-10-12-16-19-22S refrigerant air conditioning indicator (SSGN 22S 014-0187 Welding 1-1/8) : Automotive
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