Cov tswv tsev tau nce xaiv cov qhov rooj pov thawj rau kev txhim kho kev ruaj ntseg thiab kev thaj yeeb ntawm lub siab. Cov qhov rooj no yog tsim los nrog cov thav ntawv ntxiv thiab cov txheej txheem kaw kom tiv thaiv kev yuam kev nkag. Cov khoom siv hnyav, xws li steel thiab ntoo, muab lub zog ntxiv. Pry-proof qhov rooj feem ntau muaj ntau lub ntsiab lus xauv thiab cov khoom siv tiv thaiv tamper. Los ntawm kev nqis peev hauv cov qhov rooj no, cov tswv tsev tuaj yeem txhim kho lawv lub tsev kev ruaj ntseg, ua rau nws nyuaj rau cov neeg nkag mus nkag.
