路面脱空检测
detection of road surface vacancy
水泥混凝土路面脱空判定
cement concrete pavement void identification
水泥混凝土路面地基脱空识别
identifying foundation void of cement concrete pav
城市沥青道路路面
city bitumen road surface
高等级公路路面抗滑石料
highway pavement stone sliding
公路路面早损
breakage of highway pavement in early time