1, coaxial kav hlaub sab saum toj thiab taper yog muaj tsawg dua 0.01.
2, taper kav hlaub Siv txujci painting cov tshev mis uas Morse taper qhov txheem twg yuav tsum tsis tau less li 75%, thiab ze li ntawm loj kawg.
3, cov hardness uas muaj qhov yuav tsum tau kev kho mob kub: kws dhos yuav tsis tsawg tshaj RC60 taper kav hlaub yuav tsis tsawg tshaj RC42.
Tam sim no, tsis hais kws dhos ntawm taag saum thiab ntxaiv uas khi yog siv tshuab metric degrees, khob degrees uas luaj li cas thiab saum toj no nyob rau sab saum toj rau cov neeg kawm ntawv sib chwv lub qhov ncaj qha muaj kev txheeb ze, zauv hnyav artifacts Shi, kom nws tau kawm loj heev ntawm cov hwjchim saum toj kawg nkaus nruj, khob degrees xaiv tau xwb, vim cov npoo twb nruj, nyob nyuaj rau ntawm lub qhov saum toj kawg nkaus rau qhov tawm , yog li yuav tsum tau xaiv tsim nyog ntawm lub khob hliav qab degrees.