1. Cov coaxiality yuam kev ntawm ob txoj kev ruaj khov ntawm txoj hlua khi sib khi yog ≤0.05mm
2. Cov coaxiality yuam kev ntawm ob daim ntawm ob txoj hlua khi yog elastic0.1mm
3. Lub angular yuam kev ntawm ob lub axes tsawg dua 1 °;
4. Qhov kev ncua deb ntawm tus tsav tsav thiab lub zog kawg taub yuav tsum yog 5-10 hli;
