Спасибо (thank you) shawn coylve;
It is require understaning as you say.
You czeck our news here==
"Russian Helicopters, the Russian helicopter engineering holding company, a part of United Industrial Corporation Oboronprom, and the Russian Center for Scientific and Technical Services Dinamika (CSTS Dinamika) have signed a cooperation agreement in the marketing, development, production, and delivery of technical training means for flight and engineering personnel operating Russian-made rotorcraft.
Under this agreement the parties are planning to jointly create, certify, and run technical training units (TTU) for flight and engineering personnel operating helicopter complexes of various roles.
The agreement also envisions joint marketing and the promotion of modern TTU for rotorcraft manufactured by Russian Helicopters on local and international markets within integrated delivery contracts."