短语词组短語slope toe wall 坡腳牆etching of slope toe 沖蝕坡腳Slope toe circle 坡趾圓slope toe line 坡腳線flow velocity at slope toe 坡腳流速backfilling for slope toe pressing 廻填壓腳cut -fill at slope toe 坡腳換填toe slope 山麓坡toe of slope 坡腳;坡趾 返回 slope toe