Dab tsi yog cov hnab looj tes tawv?

Dab tsi' s sib cais hnab looj tes?

Txheem tawv yog qhov hauv qab ntawm qhov tawv tom qab tawg. Thaum cov tawv tau ua ntej los ntawm kev nkaum ntawm ib tug tsiaj, nws yog qhov tuab heev. Yog li, ua ntej peb yuav tsum faib nws mus ua khaubncaws sab nraud povtseg thiab hauv qab txheej yog "split-tawv."

Cais cov tawv yog qhov pheej yig dua tab sis kuj muaj qhov ua kom zoo dua, feem ntau nws yog siv rau cov hnab looj tes ua haujlwm thiab muaj qhov tsis zoo. Split-tawv muaj ntau yam sib txawv. Split-tawv yog mos, siab abrasion tsis kam, hloov tau thiab ruaj khov.

Nws yog txhua lub hom phiaj thiab muaj txiaj ntsig zoo thaum nws hais txog kev tiv thaiv dav dav hauv thaj chaw ua haujlwm lossis thaj chaw tsim kho.