They are trying to hide the truth about the full potential of the patent, and we will pay the price facing China. This pump technology has no max pressure limit except containment and is silent. Water velocity can reach mach 4.5 at the outlet.
It is the true industrial path for Hydrogen
According to a foreign news report, China's Ming-class submarines have begun testing the installation of an air-independent propulsion (AIP) system that operates on liquid oxyhydrogen cells.
http://www.taipeitimes.com/News/editorials/archives/2006/12/06/2003339341
https://nationalinterest.org/blog/buzz/china-claims-have-technology-build-super-stealth-submarines-dont-bet-it-27422
https://patents.google.com/patent/CN105151256A/en