Uburambe bwimyaka 20 muriki gice
Izina ryibicuruzwa: Automatic Self Clearing Rotary Airlock Valve
Ikoreshwa: Sisitemu nziza yo kwanduza pneumatike
Ibikoresho: Birashobora gutegurwa (Ibyuma bitagira umuyonga cyangwa ibyuma byangiza)