two excavators operating on man made land beside waterfront sand piles at construction site. - 疏浚業 個照片及圖片檔採石場, 職業, 建築地盤
conservationists dredging and cleaning water at canada dock wetlands in london, uk - 疏浚業 個照片及圖片檔英國, 職業
on the coast, dredging ships and excavators work together to carry out land reclamation work - 疏浚業 個照片及圖片檔