Supply Of , High Vacuum Suction Machin: A Suction Pump Works By Atmospheric Pressure When The Piston Is Raised, Creating A Partial Vacuum, Atmospheric Pressure Out Side Forces Water Into The Cylinder, Whence Is Permitted To Scape By An Outlet Valve . Vacuum Is Created By A Plastic Piston And Cylinder System, With Four Vacuum Creating Modules. As Per Specifications Attached. Make/Brand - Anand Medicaids Pvt Ltd (Hi- Vac Ms) Or Similar