Cov haujlwm ntawm hluav taws xob cov menyuam qhov muag tsis pom kev
1. txuag hluav taws xob thiab tiv thaiv ib puag ncig
Cov menyuam kaw lub qhov rooj thiab lub qhov rais muaj cov yam ntxwv ntawm cov qauv zoo nkauj thiab tshiab, ua haujlwm yooj yim thiab qib siab, ua haujlwm yooj yim, rugged, muaj zog kev sib tw, zoo sealing, tsis muaj haujlwm nyob hauv thaj chaw hauv av, hloov tau yooj yim thiab yooj yim qhib thiab kaw, thiab lwm yam, uas tau ua tiav zoo qhov no hauv kev teb rau lub zog nruab nrab-txuag khoom thiab kev tiv thaiv ib puag ncig.
2. Kev tiv thaiv txias
Cov hluav taws xob cov menyuam roj hmab qhov kev ua haujlwm muaj kev sib khi zoo heev, tuaj yeem ua kom muaj txiaj ntsig zoo ntawm kev tiv thaiv txias, thiab zoo heev rau koj siv hauv tsev