Qhov loj thiab qhov tshwj xeeb ntawm cov ntsia hlau- hom davhlau ya nyob twg thaiv yog qhov tseem ceeb rau lawv qhov kev ua tau zoo thiab daim ntawv thov. Cov qauv sib txawv sawv cev rau qhov sib txawv qhov loj me thiab cov yam ntxwv, muab ntau yam kev xaiv rau kev sib txuas ntawm cov xaim lossis cov neeg xyuas pib hauv cov khoom siv hluav taws xob thiab hluav taws xob. Piv txwv li, "08" qauv ntsia hlau- hom davhlau ya nyob twg thaiv qhia qhov sib txawv ntawm cov davhlau ya nyob twg hauv millimeters, siv rau kev xa cov teeb liab tam sim no lossis hluav taws xob. Lwm cov qauv suav nrog "5", "62", "0", thiab "54", txhua qhov tsim nyog rau kev thov sib txawv.
Cov qauv no tsis tsuas yog sib txawv qhov ntau thiab tsawg ntawm lub davhlau ya nyob twg tab sis kuj suav nrog lwm cov ntaub ntawv tseem ceeb xws li ntsuas tam sim no, ntsuas qhov ntsuas hluav taws xob, cov khoom siv, thiab cov txheej txheem mounting. Xaiv cov ntsia hlau tsim nyog- hom davhlau ya nyob twg thaiv yog qhov tseem ceeb los xyuas kom muaj kev ruaj ntseg thiab kev ntseeg tau. Yog li ntawd, thaum yuav khoom, nco ntsoov sab laj nrog cov chaw tsim khoom cov ntawv qhia cov khoom lossis cov ntawv teev npe online kom pom cov qauv davhlau ya nyob twg zoo tshaj plaws rau koj daim ntawv thov.
