Uburambe bwimyaka 20 muriki gice
Izina ryibicuruzwa: Umuvuduko mubi Pneumatic Gutanga Rotary Airlock Valve
Ikoreshwa: Sisitemu mbi yo kwanduza pneumatike
Ibikoresho: Birashobora gutegurwa (Ibyuma bitagira umuyonga cyangwa ibyuma)