pressure-wave supercharger the opened-up drum can be used to demonstrate the supercharging by sliding the gas column the gas-column slide is moved along a curved path, so that the actual flow conditions can be shown description ordernumber 416 see also: injection-nozzle holder with hole-type nozzle and pintle-type nozzle roots blower volume controlling unit (in-line injection pump) primary pressure regulation KE-Jetronic