Inogona kugadziriswa nyore nyore papiston tsvimbo pasina zvimwe zvekuisa chisimbiso.
Inogona kutangwa nekukurumidza nekuda kweiyo ventilation slot
Nekuda kweiyo geometry yemuromo wekuisa chisimbiso, iyo firimu yekuzora inogona kuchengetedzwa, saka friction idiki uye kushanda kwakatsetseka.
Inogona kushandiswa pakuzora mhepo ine oiri nemafuta isina mweya