Amagwiritsidwa ntchito kudziwa mphamvu zomwe zimakhudzidwa (izod) ya zinthu zopanda zitsulo monga pulasitiki, zolimbikitsira pulasitiki zolimbikitsira, zida zamiyala, ndi zina zowonjezera zili ndi mitundu iwiri : Mtundu wamagetsi ndi woyimba foni: Makina oyimbira a Puless Appling ali ndi mawonekedwe ogwirizana kwambiri, kukhazikika kwabwino komanso muyeso waukulu; Makina oyesera amagetsi amatengera ukadaulo wozungulira, kupatula kuti kuwonjezera pa zabwino zonse za mtundu wa woyimbira, amathanso kuyeza mphamvu, mphamvu yokweza, ikani ngodya, ndi mtengo wapakati wa batch; Ili ndi ntchito ya kukonza kwa mphamvu ya mphamvu, ndipo imatha kusunga zambiri za mbiri yakale. Makina angapowa atha kugwiritsidwa ntchito pakuyesa kwa izod kumathandizanso m'mabungwe asayansi