Txhawm rau xaws cov phuam kauv caj db , tab sis uas tuaj yeem them nrog daim ntaub, kuj tseem yuav siv lub khawm, xov txiab, lub tshuab xaws.
Txhua ntu sab nraud yuav raug chwv thiab fasciated.Ntawm ib sab ntawm txoj phuam qhwv caj npab, ua rau 4 lub quav ntawm ib qho tob ntawm 3-5 cm ntawm ib qho sib npaug zos los ntawm txhua lwm yam thiab ib qho ntawm tib txoj phuam kauv caj dab.
Nyob deb ntawm 30cm, peb muab cov quav (peb txo cov phuam qhwv caj dab rau 5-7 cm.) Thiab nteg ob peb kab.
Ua hneev.
Xa rau txoj phuam qhwv caj npab, xaws lub pob thiab hnav nrog kev lom zem. Ob peb cov tswv yim ntxiv ntawm tib txoj phuam
ib qho chaw