... of internal combustion engines.(2)This unit is composed of oil feed pump,circulating pump ,strainer,fine filter(auto or half ... .(4)KHVU-CIII-XE-C is the very ordinary model,its configuration integrates oil feed pump,circulating pump,strainer,auto filter or ... duplex backwash filter,flow meter,mixed oil tank ,composite heating device,viscosity and temperature control system with ...