spiral case造句怎么写

2、The spiral case disk shaped drain valve joystick fracture repair of Three Gorges Hydropower Station

4、Heituhu formation is gray and gray-black silty clay with limnological facies in early and middle period of Holocene, and bearing lots of spiral case;

6、In order to ensure the material quality and welding quality of expansion joint of spiral case, and the safety and reliability of hoisting equipment, the practical, scientific and reasonable installation technique is key and essential.

3、Through analysis, we consider that the spiral case of left powerhouse units works normally, and that the stress and deformation are within the range of allowable design.

1、Backwater hole and then right to the water flow convergence, the flow along the spiral case.

5、Through reason analysis the problem has been successfully solved by the installation of water diverting cone and the spiral case. Now the pump units run well.