Cov yeeb nkab ua tshuab muaj cov yeeb nkab diameters sib txawv thiab cov phab ntsa tuab, cov txheej txheem ntau lawm, cov khoom sib txawv, thiab cov nqi. Yog tias koj xav yuav ib txheej ntawm cov yeeb nkab ua tshuab, koj tuaj yeem qhia peb qhov muag txog koj cov kev xav tau, thiab nws yuav muab peb cov phiaj xwm thiab cov lus hais rau koj.
