Teeb meem yuav tsum tau pom nyob rau hauv kev siv cov rooj tog zaum nraum zoov
Qhov zoo ntawm cov rooj tog zaum nraum zoov
1. Ua ntej ntawm tag nrho cov, nws cov nqi yog tsawg, thiab lub installation yog siv zog, yooj yim rau kev khiav lag luam, thiab tsis yooj yim rau kev puas tsuaj. Kev tu thiab tu yog yooj yim heev.
2. Nws muaj kev ua tau zoo, kev tiv thaiv ib puag ncig, tsis muaj tshuaj lom thiab tsis qab, tiv thaiv corrosion, tiv thaiv kev laus, UV tsis kam, tsis yooj yim rau deform thiab tawg, thiab kev ua haujlwm tsis zoo.
3. Nws txoj kev ua haujlwm muaj ntau haiv neeg, uas tuaj yeem saws, nailed thiab drilled. Cov ntaub ntawv tuaj yeem rov ua dua yam tsis muaj nkim peev txheej thiab yog ib puag ncig zoo.