1.Isekela ukushaja kwezimbobo eziningi ngesikhathi esisodwa, yanelisa izisetshenziswa ezimbili ngesikhathi esisodwa.
2.I-convex eyenziwe ngomshini nokuzwakala kwe-concave, okubonakalayo okunengqimba kanye nomuzwa wokubamba okungasheleli
I-3.Inqubo ye-aluminium alloy metal oxidation, ukuthungwa kwe-super metallic, izinga lokushisa eliphansi kuyo yonke indawo, ukuqhutshwa kwe-thermal okuphezulu
4.I-chip ehlonzayo ehlakaniphile, ishaja ngokuvikela ukushaja kanye nokuvikela okungaphezulu kwezinga lokushisa ngesikhathi esifanayo