... at joint prolongs the service life4. Unitary body cast by aluminum alloy with optimum heat transferAdvantage:1. Compact structure, Low weight2 ... valve plate with high capacity.5. Piston is made by aluminum with two piston ring, compressor performance more stable.6. ... observe lubricated oil.13.Compressor body, made by cast aluminum, easy to radiate and more reliable, longer life service.14. Reliable ...