Ngwa:Maka cylinders nwere nnukwu mmiri mmiri, a na-atụ aro iji plastik cylinder mee ka ọ dịrị gị mfe iji aka na-ebu cylinders. Okpu valvụ rọba na tubes dip dịkwa.
Mmepụta akpaaka:Ahịrị igwe anyị na-akpụzi akpaka ga-ekwe nkwa ịdị nro nke interface cylinder, si otú a na-abawanye nkwụsi ike na ọkwa nchekwa ya. Anyị elu-arụmọrụ akpaka nhazi na mgbakọ usoro na-ewetara anyị mmepụta ike na mkpụmkpụ oge maka mmepụta.
Nhazi nha:Anyị nwere ike nabata iwu nke nha omenala, ọ bụrụhaala na ọ dị n'ime asambodo anyị. Biko nye nkọwapụta ka anyị wee nwee ike nyochaa ma nye eserese nka.