dredging waterway造句

Shanghai waterway bureau ( swb ) is a large nationalizes enterprise , with the major business for dredging waterway . in the ages of planned economy , as she belonged to constitution , all of the working vessels and equipments depended on national investment to build . since liberation she has developed gradually to own a dredgers flotilla
上海航道局是一个以航道疏浚为主业的国有大型企业，在计划经济的年代属事业性单位，所有的生产船舶机具都是依靠国家投资建造，建国以来已经逐步发展成为国内最大且在世界疏浚业中排名第七位的疏浚船队。
It's difficult to find dredging waterway in a sentence. 用dredging waterway造句挺难的