Hauv kev tswj hwm hauv nroog loj thiab kev tswj hwm kev nyab xeeb, bollards yog ua si ib qho tseem ceeb tshaj plaws yog qhov ua tau zoo lub cev. Lawv cov qauv ruaj khov thiab hloov kho cov khoom lag luam tsis raug cai lossis kev sib tsoo tsis raug cai, yog qhov chaw tseem ceeb, thiab cov chaw tseem ceeb.
Kev sib tsoo Bollards feem ntau yog tsim los ntawm high - lub zog steel lossis cov khoom siv sib xyaw, muab kev cuam tshuam tshwj xeeb. Qee cov qauv qib siab tau nruab nrog cov kev xav paub zoo uas cia li xaiv tau cov tsheb thiab qis dua los ua cov teeb meem ib ntus thaum tsim nyog. Qhov kev ua haujlwm zoo no ua rau lawv tsis haum tsis yog rau kev tiv thaiv kev nyab xeeb, xws li cov neeg ua phem tawm tsam lossis cov tsheb yuam kev hauv tsheb sib nraus.
Hauv cov ntawv thov hauv nroog, tsoo Bollards yog cov chaw ua haujlwm rau tsoomfwv, lub tsev kawm, tsev kawm, tshav dav hlau, thiab cov dav hlau hluav taws xob, thiab cov dav hlau nuclear. Piv txwv li, hauv Tebchaws Europe thiab Tebchaws Asmeskas, ntau lub nroog tau teeb tsa Retractable kev tsheb khiav taug kev txhua hnub thaum muaj kev kub ntxhov. Xyoo tsis ntev los no, kuv lub tebchaws tau nce qib, tshwj xeeb tshaj yog nyob rau hauv kev ruaj ntseg ntawm cov xwm txheej tseem ceeb, uas muaj kev sib tsoo Bollards tau dhau los ua kev ntsuas kev nyab xeeb.
Tsis tas li ntawd, tus qauv tsim ntawm kev sib tsoo Bollards nce ntxiv kev ua kom zoo nkauj thiab sib haum xeeb nrog ib puag ncig hauv nroog. Qee cov khoom lag luam zais thoob plaws lossis cov qauv tsim uas muab tso rau hauv nrog cov toj roob hauv pes, cov kev tiv thaiv kev sib ntsib thaum tswj cov tsos zoo. Txawm li cas los xij, lawv cov kev xa tawm yuav tsum tau npaj ua tib zoo npaj kom tsis txhob muaj kev cuam tshuam tsis tsim nyog rau cov tsheb khiav ib txwm muaj.
Zuag qhia tag nrho, bollards tag nrho yog ib qho tseem ceeb ntawm cov kev nyab xeeb niaj hnub. Nrog cov thev naus laus zis, yav tom ntej sib tsoo bollards yuav dhau los ua kom ntse dua thiab meej, muab kev tiv thaiv ntau dua rau hauv nroog muaj kev nyab xeeb. Qhov tsim nyog siv ntawm cov cuab yeej no tsis tsuas yog siv cov kev pheej hmoo ntawm lub nroog tag nrho cov peev xwm thaum muaj xwm txheej ceev tag nrho.