Uburambe bwimyaka 20 muriki gice
Izina ryibicuruzwa:自动自清旋转气锁阀
Ikoreshwa: Sisitemu nziza yo kwanduza pneumatike
ibikoreshoo: biashobora gutegurwa (Ibyuma bitagira umuyonga cyangwa Ibyuma byangiza)