Ebintu by'okukyebera eby'omuringo gw'empapura ibiri eby'okukyebera valvu

Ebintu by'okukyebera, ebyetaago by'eby'obuhangwa hamwe n'emiringo y'okukyebera ebikwato by'okukyebera eby'okukoresa ebiri omu wafer