______is the engineering structures made of shaped steel and steel plate.
举一反三
- Steel structure is the engineering structures made of shaped steel and steel plate.
- Engineering materials such as steel and concrete are the basis of construction projects.
- The procedure of strengthening damaged structures on a ship by using wood or steel is called（）.
- This knife is made of steel __________ and it can be used for a long time.
- Is a yurt made from steel frame covered with felt?