... operation.3, PURE AIR FLOW. it is oil free design, no lubrication oil needed during operation.4, CORE TECHNOLOGY ... FASHION AND DURABLE DESIGN. compact structure, light weight; under normal situation, 6, USE SAFETY. with multiple self protection system, if here ... maintenance, just drainage regularly. 8, LOW ENERGY CONSUMPTION. automatic design, automatic stop and restart control, low consumption.9, HIGH ...