Click to open the vacuum chamber (if the click does not respond, the system did not get permission to pump the remote control should be to control the pump handle on the operation), and in turn click on the slow vacuum (vacuum quickly), butterfly valve to Pumping chamber to the vacuum
The click cavity room's vacuum pump causes its opening (if the click had not responded, is the system has not obtained pump's remote control jurisdiction )And in turn click slow vacuum (fast vacuum), butterfly to whip chamber to vacuum。