Standard test method for retroreflectance of horizontal coatings 平面涂層回復(fù)反射的標(biāo)準(zhǔn)試驗方法
Standard specification for minimum retroreflectance of newly applied pavement marking using portable hand - operated instruments 使用便攜式手操作裝置對新應(yīng)用人行道標(biāo)記的最小回射測定的標(biāo)準(zhǔn)規(guī)范