Kunamabhulashi okuvala anezinhlangothi ezimbili ezinhlangothini zombili zohlaka lomnyango, futhi ngaphansi kufakwe amakhethini e-Pvc.Umnyango ungavulwa futhi uvalwe ngokushesha, futhi isivinini sokuvula singafinyelela ku-0.2-1.2 m/s, okucishe kube izikhathi eziyi-10 ngokushesha kuneminyango yensimbi evamile, futhi idlala indima yokuzihlukanisa ngokushesha., nge-switch switch esheshayo, i-heat insulation, i-dustproof, i-insectproof, i-soundproof kanye neminye imisebenzi yokuvikela, iyisinqumo sokuqala sokunciphisa ukusetshenziswa kwamandla, ukugcina kungenathuli, kuhlanzekile futhi kungashintshi, kanye nokuqinisekisa indawo yokusebenza ehlanzekile.