Rooj vag concertinatau raug lees paub tias yog ib lub cuab yeej muaj zog heev los tiv thaiv cov yeeb ncuab lossis tsiaj txhu tsis xav tau. Cov hniav ntse thiab cov qauv kauv tuaj yeem ntes tau txhua tus neeg uas xav hla lossis hla cov hlau concertina.
Feem ntau hais lus, concertina laj kab yog kev sib xyaw ua ke ntawm concertina hlau thiab saw hlau txuas laj kab lossis welded hlau mesh uas tsuas yog thaiv cov neeg tawm thiab yuav tsis ua rau koj mob (saib daim duab 1). Hom concertina laj kab no pom dav hauv tsev loj cuj, tshav dav hlau, thaj chaw nyob, tsoomfwv thiab thaj chaw lag luam.
Lwm hom kev laj kab concertina yog ua los ntawm cov xov hlau concertina kauv. Ntawm ib sab tes, lawv tuaj yeem khi rau ntawm cov qauv hlau los ua ib lub laj kab ruaj ntseg (saib daim duab 2). Ntawm qhov tod tes, lawv tuaj yeem ntsia tau yam tsis muaj cov qauv hlau (saib daim duab 3).