Adaftar ST sun ƙunshi polymer ko ƙarfe na waje jiki da taro na ciki wanda ya dace da daidaitaccen tsarin daidaitawa.Koma zuwa zanen da ke sama don bayanin girma.Waɗannan adaftan an yi su daidai kuma an ƙera su zuwa ƙayyadaddun bayanai masu buƙata.Haɗin yumbu / phoshphor tagulla jeri hannayen riga da madaidaicin gyare-gyaren polymer da madaidaicin matsugunin ƙarfe yana ba da daidaitaccen aikin injiniya na dogon lokaci da aikin gani.