Cov duab ntawm cov txiv kab ntxwv tev feem ntau yog puag ncig lossis oval, nrog cov xim txiv kab ntxwv, thiab xim txiv kab ntxwv-xim liab lossis xim av daj {{5 5 5}
Cov cim tshwj xeeb cov yam ntxwv ntawm txiv kab ntxwv tev muaj xws li:
Puag ncig lossis oval: cov duab ntawm txiv kab ntxwv tev feem ntau yog puag ncig lossis oval nrog cov npoo du .
Nto them nrog cov roj me me: cov nplaim dej txiv kab ntxwv yog them nrog cov roj me me, uas yog ib qho ntawm nws cov yam ntxwv xws li .
