Kukonza Majeti Osagwira Ntchito (AJM) ndi njira yopangira makina yomwe imagwiritsa ntchito tinthu tating'onoting'ono tomwe timatuluka mwachangu kuchokera m'mabowo a nozzle kuti tigwire ntchito pamwamba pa chogwirira ntchito, kukupera ndikuchotsa zinthu kudzera mu kugundana ndi kudula tinthu tating'onoting'ono mwachangu.
Jeti yowuma kwambiri kuwonjezera pa kukonza pamwamba pa chinthucho, kuphatikizapo kuphimba, kuwotcherera ndi kuyika ma plating musanagwiritse ntchito kapena mutagwiritsa ntchito, popanga zinthu, malo odulira ang'onoang'ono ndi oyenera kwambiri kudula mbale, kupukuta malo, kugaya, kutembenuza, kuboola ndi kulukira pamwamba, zomwe zikusonyeza kuti jeti yowuma ingagwiritsidwe ntchito ngati gudumu lopera, chida chozungulira, chodulira mphero, kuboola ndi zida zina zachikhalidwe.
Ndipo kuchokera ku mtundu kapena muzu wa ndege, ukadaulo wa ndege yodumphadumpha umagawidwa m'magulu a ndege zamadzi (zodumphadumpha), ndege zodumphadumpha, ndege zodumphadumpha ndi zina zotero. Lero, choyamba tikambirana za chitukuko cha ukadaulo wa ndege yodumphadumpha.
Jeti yamadzi yovunda imapangidwa pogwiritsa ntchito jeti yamadzi yoyera. Jeti yamadzi (WJ) inayamba m'ma 1930, lingaliro limodzi ndi la kukumba malasha, lina ndi kudula chinthu china. Kale, mphamvu yomwe jeti yamadzi imatha kufikako ili mkati mwa 10 MPa, ndipo ingagwiritsidwe ntchito potsuka mipata ya malasha, kudula zinthu zofewa monga mapepala ndi nsalu, ndi zina zotero. Komabe, pamodzi ndi chitukuko cha sayansi ndi ukadaulo, njira zatsopano zosiyanasiyana zosangalatsa zinawonekera m'munda wa jeti yamadzi yapadziko lonse kumapeto kwa zaka za m'ma 1970, yomwe ikuyimira Abrasive Water Jet (AWJ) yomwe idaperekedwa ndi Dr Mohamed Hashish mu 1979.