This is not a regular English word, but a trademark or initials word commonly used in western languages. Generally, part of two or more words is taken as the root and then recombined. As far as REVTECH is concerned, it should be composed of REVTech. The specific meaning depends on the specific situation. TECH is usually TECH, and REV has many different words. In short, it should be the name of a product or company with technology and technology.