Dredging

例句:

• Dredging machines of a great variety have been constructed. 威廉·亨利·杜利特. 世纪发明.
• The present method of dredging is of the hit or miss character, while the submarine method is capable of thorough work. 佚名. 神奇的知识之书.
• The gold-dredging spoken of refers to the working of gold-bearing sands found at the mouth of certain rivers in Alaska and South America. 佚名. 神奇的知识之书.
• Submarine Dredging. 佚名. 神奇的知识之书.

编辑:纽曼