Cov hlau hlau txhuas yog ib feem ntawm cov khoom lag luam txhuas. Nws yog ib lub raj txhuas puag ncig uas sib dua thiab muaj cov qhov tshwj xeeb ntawm qhov chaw thiab cov khoom siv tshwj xeeb rau kev sib dhos khoom.
1: Cov khoom no yog lub tsheb thauj khoom aluminium profile bar cia khoom, uas feem ntau yog siv rau kev thauj mus los thiab khaws cia cov kab ntau lawm lossis cov khoom siv tau yooj yim.
2: Cov hlau profile txhuas tuaj yeem tsim los rau ntau qhov ntau thiab tsawg thiab ntau yam khoom siv thav duab raws li qhov yuav tsum tau ua, nrog cov yas muaj zog thiab kev sib dhos yooj yim.
