-Nruam deformation tsis tu ncua: Cov phaj / sawb thiab cov chais yog nyob rau hauv kev sib cuag; Txhua yob siv tsuas yog hauv zos dabtsi yog khoov, yuav tsum tau me me deformation rog, ua cov qauv no haum rau loj ntau lawm.
-Kev tswj xyuas qhov tseeb: Tsis muaj xws li kev sib sau ceev, qhov sib txawv ntawm cov menyuam, thiab cov menyuam siab ncaj qha cuam tshuam rau qhov raug qhov tseeb ntawm qhov khoom kawg. Txiav qhov tseeb feem ntau tuaj yeem khaws cia li ntawm ± 0.5 hli.
-Tus nqi siv cov khoom siv siab: Cov khoom siv tus nqi siv hauv yob txoj kev yog feem ntau tsis pub tsawg dua 90%, ua rau nws cov khoom siv ntau dua -ntau dua li cov txheej txheem xws li stamping.
-Kev tswj cov hlab ntsha rov qab: Cov txheej txheem dov ua kom yooj yim rau kev tswj hwm thiab kev them nyiaj rov qab rau cov khoom siv xws li siab- lub zog steel, ua kom muaj kev ruaj ntseg zoo ntawm cov khoom.