| EN ISO 20471 tus qauv qhia txog tsab ntawv X: 3 chav kawm rau khaub ncaws |
| Tus qauv txhais 3 xim: daj, txiv kab ntxwv thiab liab. Cov yam ntxwv ntawm cov khaub ncaws tiv thaiv uas pom pom tau zoo tau teev tseg hauv EN 20471: 2013 tus qauv. |
| |
Chav kawm 3 |
Chav kawm 2 |
Chav Kawm 1 |
| Cov khoom siv yooj yim (fluorescent) |
0.80m² |
0.50m² |
0.14m² |
| Retro- cov khoom siv hluav taws xob |
0.20m² |
0.13m² |
0.10m² |
| Khoom siv nrog cov yam ntxwv sib xyaw |
|
|
0.20m² |
| Cov khoom siv yooj yim yuav tsum qhwv lub cev thiab muaj qhov dav tsawg kawg nkaus ntawm 50 hli dhau qhov ntev |
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