驗證網址en.wikipedia.org安全性

Mach number - Wikipedia, the free encyclopedia

where M is the Mach number, u is the local flow velocity with respect to the boundaries (for example internal, like for an object immersed in the flow or external, like a channel), and c is the speed of sound in the medium. The local speed of sound, and t...

網址安全性掃描由 google 提供