Examlex
Which of the following is NOT one of the contributions made by Franz Gall?
Service Valve
A valve used in various mechanical and fluid systems for maintenance, repair, or diagnostic purposes, allowing for control of fluid flow.
Front-Seated
Typically refers to valves in refrigeration or HVAC systems that are in the open position when the valve stem is screwed in all the way.
Refrigerants
Fluids used in air conditioning and refrigeration systems to absorb and transport heat.
R-134a
A hydrofluorocarbon refrigerant used in air conditioning systems, known for its low impact on the ozone layer compared to previously used refrigerants.
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