Kev tu kom zoo thiab kev saib xyuas cov chaw khaws cia (tshwj xeeb yog lub thawv hnab looj tes tsheb) yuav ua kom lawv huv si thiab huv si.
Ua ntej ntxuav cov thawv ntim khoom (tshwj xeeb yog lub thawv hnab looj tes tsheb), kom huv si ntim cov khoom. Siv lub tshuab nqus tsev ntxhua khaub ncaws kom tshem tawm cov plua plav, lossis siv cov phuam da dej, txhuam txhuam, paj rwb swabs, thiab cov xab npum nruab nrab los so cov tawv nqaij tawv.
Tom qab ntxuav, khaws lawv kom zoo - cua thiab qhuav kom tsis txhob xeb lossis ntxhiab tsw. Rau cov strip-puab qhov chaw los yog velor sab hauv trim, siv lub tsheb ciab, roj hmab tiv thaiv, los yog velor tiv thaiv raws li tom qab ntxuav.
Tsis txhob tso cov khoom ntse lossis cov khoom noj muaj kua hauv lawv txhua hnub. Tsis tu ncua xyuas tias qhov qhib thiab kaw mechanisms ua haujlwm zoo thiab ua kom qhuav.
