Nrog rau txoj kev loj hlob ntawm lub teb chaws txoj kev loj hlob tib neeg txoj kev paub txog kev nyab xeeb yog maj mam nce thiab ntau thiab ntau tus neeg paub txog qhov tseem ceeb ntawm kev nyab xeeb tsheb. Txhua xyoo yeej ib txwm muaj qee qhov chaw ntawm tsheb npav kev nyab xeeb kev sib tsoo uas ua rau cov neeg caij tsheb raug mob thiab txawm tias tuag ib zaug.
Hnub no los qhia koj txog lub tsheb npav loj txwv tsis pub tshaj 100 lub cim yog xyoo 2019 los ntawm pej xeem kev ruaj ntseg hauv nruab nrog cev ntawm lub chaw saib xyuas kev khiav tsheb tau tshaj tawm ib tsab ntawv ceeb toom, ceeb toom qhia qhov ntev ntawm lub tsheb npav siab tshaj 6 meters siab tshaj plaws ceev txwv ntawm 100 / km ib teev. Kev txwv ceev 100 cov paib yuav tsum raug muab tso rau hauv lub nraub qaum ntawm lub cev tiaj tus, txhawm rau ceeb toom cov neeg koom nrog kev sib tw kom zoo dua rau cov neeg caij tsheb hauv kev saib xyuas ntawm pawg neeg. Cov chaw thauj mus los hauv zos thiab kev tswj hwm xwm txheej ceev yuav tsum tau koom tes hauv kev ua raws li 100 qhov kev txwv ceev.
Kev txwv ceev ib puas daim paib feem ntau muaj cov ntaub ntawv hauv qab no: 1. PMMA (acrylic) khoom, cov khoom tsim los ntawm cov khoom tiav muaj lub neej ua haujlwm ntev, muaj kev cuam tshuam siab siv rau lub tsheb npav ceev txwv ib puas cim xav rau lwm yam khoom zoo dua. 2. Cov khoom siv PET, kev siv cov khoom siv PET ua cov tsheb npav ceev txwv cov cim kev lag luam ntau dua, siv tus nqi qis. Kuj tseem yog lub npav ceev txwv cov cim hauv cov khoom siv ntau dua. Tab sis nyob rau hauv kev siv cov txheej txheem yuav tshwm daj ntug nrog rau qhov teeb meem ntawm ceev attenuation ntawm lub teeb reflective. 3. Cov khoom siv PVC, cov khoom siv PVC ntau dua li cov khoom siv PET lub neej luv dua, tab sis vim qhov ua tau zoo ntawm cov khoom siv PVC number case nqus, nyob rau hauv lub tsheb npav ceev txwv 100 cov paib kuj tau siv ntau dua. Cov nqi ua haujlwm tsawg dua piv rau acrylic hauv PET. Feem ntau siv sab nraum zoov yees duab-dav hlau ua, kev siv tom ntej ntawm cov txheej txheem yog yooj yim kom ploj, tawg ntawm daim tawv nqaij tshwm sim.
