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Fan is China's customary abbreviation for gas compression and
transmission machinery. Generally speaking, fan includes
ventilating fan, blower and wind turbine. Gas compression and gas
conveying machinery is the machinery that converts the rotating
mechanical energy into gas pressure energy and kinetic energy, and
transports the gas out. The main structural components of the fan
are impeller, casing, air inlet, bracket, motor, pulley, coupling,
muffler, transmission parts (bearings), etc.