Tsunamis travel as fast as jet aircraft in deep water, where they are spread over a far deeper water column and make for smaller and very gradual waves at the surface.
在深海水域，海啸的传播速度像喷气式飞机一样快，但在海面看到的波浪不大。
2
This paper tells the origin and cutting mechanism of waterjet cutting technology, and introduces fundamental of getting high pressure waterjet and its application.
论述了高压水射流加工技术的起源、切割机理，并介绍了获得高压水射流的基本原理和范围。
3
The paper describes the origin of cutting mechanism with waterjet cutting technology, and introduces the fundamental of getting high pressure waterjet and its application.