短语词组短语slope toe wall 坡脚墙etching of slope toe 冲蚀坡脚Slope toe circle 坡趾圆slope toe line 坡脚线flow velocity at slope toe 坡脚流速backfilling for slope toe pressing 回填压脚cut -fill at slope toe 坡脚换填toe slope 山麓坡toe of slope 坡脚;坡趾 返回 slope toe