{1. Lub zog ua kab ntawm qhov chaw mos tuaj yeem tswj tau, thiab txo qhov kev pheej hmoo ntawm cov khoom lag luam sab hauv;
2.}} siv cov txheej txheem kaw thiab tsis tshua muaj kev phom sij tau txo tus kab mob phais;
{{03. txo kev puas tsuaj rau periostring cov kab mob uas nthuav dav, thiab muab cov pob txha sib zog los ntawm cov leeg pob txha ua kom pom kev ua kom muaj micro txav tau;
4. Cencel Centration, Elastic Fixation, thiab kev nyuaj siab tsis txhob tiv thaiv kev ntxhov siab, ua rau muaj qhov qis ntawm kev rov qab dua;
{{05. tsau kom yooj yim tuaj yeem pab txhawb kev tawm dag zog thaum ntxov ua haujlwm thiab cov xeeb tsav loj;
{{06.} Kev kho sab hauv sab hauv yog muab tshem tawm los ntawm kev phais me me, tsawg tsawg;




