The procedure of strengthening damaged structures on a ship by using wood or steel is called（）.
举一反三
- Steel structure is the engineering structures made of shaped steel and steel plate.
- ______is the engineering structures made of shaped steel and steel plate.
- The main body of a ship is called ______.
- Using parallel structures can make a coherent paragraph.
- Since the weight of modern structures is carried by the steel or concrete frame, the walls do not support the building.