Rab chais hlau, tseem hu ua concertina chais rab chais hlau, rab chais hlau, concertina xaim, yog hom tshiab ntawm laj kab. Rab chais hlau xaim zoo nkauj, txuag nyiaj thiab siv tau, nrog rau kev tiv thaiv zoo, tsim kho yooj yim thiab lwm yam yam ntxwv zoo. Nws tuaj yeem ua rau hom sib txawv hla txoj kab uas hla sib txawv thiab siv dav hauv phab ntsa siab lossis thaiv phab ntsa, nws muaj cov txiaj ntsig zoo ntawm kev tiv thaiv thiab tiv thaiv.Concertina Razor Wire muaj qhov txuas txuas uas txuas ob rab chais hlau loops ua ke ntawm ntau ntu ua ntu zus. Concertina hla yam rab chais hlau nyiam qhov zoo, siv tau thiab tuaj yeem ua kom muaj kev tiv thaiv zoo dua.