rigid lining canal 刚性护面渠道

lining of canal 渠道护面

lining open canal 衬砌渠道

canal lining [水利] 渠道衬砌

canal lining block 渠道砌体

canal bottom lining 渠底衬砌

cement mortar canal lining 水泥沙浆渠道衬砌

the style of canal lining 衬砌模式

canal with concrete lining 混凝土衬砌渠道