Khoom nta:

1.Drawstring tsim yog saws, uas nruj nreem kaw qhov tsis hnov ​​tsw ntawm cov khib nyiab thiab yuav tsis av koj txhais tes.

2. Cov qauv tsim ntawm qhov tawg taw tes yog qhov yooj yim thiab yooj yim los tsim kua muag qhib, yooj yim rau siv;thiab lub hnab ntim tau ntim nrog cov hlua khi kom ruaj khov kom ntseeg tau tias cov khib nyiab tuaj yeem yooj yim tshem tawm ntawm lub thawv tsis muaj kev puas tsuaj lossis xau.

3. Zoo toughness thiab sealing kev ua tau zoo, muaj zog bearing muaj peev xwm, tsis tas yuav txhawj txog cov dej phwj tuaj.

4. Txawm hais tias nws yog hu ua lub hnab khib nyiab, nws tuaj yeem siv tau hauv txhua hnub xws li chav pw, chav ua noj, thiab chav nyob, thiab nws tseem tuaj yeem siv los khaws cov khoom siv niaj hnub xws li khaub ncaws thiab khoom ua si.