1“Light emitting surface”透光面R482.8"Light emitting surface" of a "lighting device", "light-signaling device" or aretro reflector means the surface as declared in the request for approval bythe manufact
1“Light emitting surface”透光面R482.8"Light emitting surface" of a "lighting device", "light-signaling device" or aretro reflector means the surface as declared in the request for approval bythe manufact