1. simple configuration and convenient in operation.\n\n2. the fore pump adopts the original vacuum pump imported from europe, and customer would choose the imported roots pump or homemade ones according to their purchase capacity. the pumps have high pump speed so that attain high working vacuity. \n\n3. 02equip in-line filter could keep large impurities out of equipment and prevent damaging the vacuum pump.\n\n4. the standard model of plants is closed type so that using outside easily and have nice appearance.