Isikhombisi somshado waseShandong Tonda esetintela isiphiwo lesiPolyurethane ezihlabeleka ngesicatulo siphakeme kanye nokufundiswa okuthile lokusebenza udlala wesithathu. Isiphiwo sikhutshwe ngokuphakeme (15–30 i-idegri) ukwenzela ukusuka kwesinye isithombe sesikhombiso (isibalo 70–130 Hz) yokuvamusha emphazamo yezilimi ngokukhulu. Isiphiwo semeshi yesiphiwo esikhutshweni akahleli amathetho nokuhlala kuhluke umthombo wethegi lesosebenzi, njengoko, usondo, nezilo zemali nokulula izigaba zokudla. Ukubuyelekiswa kube ngokwesiphiwo sokugcina uhlobo lwesiqephu ngokusebenzisa isithombe, ubuyekezise ukuba kuhluke kunye nokunquma kakhulu. Lalela mize kuze uzame ukuseta amaxesha ahlawuliweyo okungenhloko yokusebenzisa ukusetyenziswa komthombo.