... 33 – 65 – 98 – 20(1)Fuel supply unit is the fuel control equipment before the fuel enters into ... ,when the fuel goes through the supply unit inside,it can remove partial mechanical impurities ... of internal combustion engines.(2)This unit is composed of oil feed pump,circulating pump ,strainer,fine ... or duplex backwash filter,flow meter,mixed oil tank ,composite heating device,viscosity and temperature ...