Cov ntsiab lus ntawm kev rog rog txwv
Qaug zog txwv yog hais txog tus nqi siab tshaj plaws thaum tsis muaj kev ntxhov siab tshwm sim tom qab kev ntxhov siab tsis kawg. Nws tseem hu ua qhov txwv tsis pub tshaj. Lub zog ua kom tsis muaj zog ntawm ib qho khoom siv yog qhov muaj qhov ua tau ntawm cov khoom siv, uas sib txawv raws cov yam ntxwv ntawm cov voj voog, hom kev deformation ntawm cov ntawv xeem, thiab ib puag ncig uas cov khoom siv tau nyob, thiab lwm yam. Qhov ntsuas yuav tsum tau ua qee qhov ntsuas kom du qhov me me kom ntsuas los ntawm kev siv lub zog sib zog.