北方土石山区
Rocky mountain areas of northern China
earth-rock mountainous area
华北土石山区
rocky mountainous area of North China
Rocky mountain areas of northern China
Mountainous area in north China
Mountain and stony area
rocky mountain area of northern China
冀北土石山区
northern mountainous area of Hebei Province
土石山区
Loess bill area
earth rocky mountain areas
earth-rocky mountainous area
Earth and rocky area
Earth-rock mountain region
mountainous area
二灰碎石土底基层
lime fly-ash gravelly soil sub-base
加筋碎石土
reinforced cushion gravel
建筑用卵石、碎石
Pebble and crushed stone for building
水泥稳定碎石土
cement stabilized macadam soil