RZD and Transmashholding sign agreement on locomotive maintenance April 19, 2011 | Europe News Russian Railways (RZD) and US-based TMH Service, a subsidiary of ZAO Transmashholding, have signed a contract for maintenance of locomotives. In 2011, TMH-Service will overhaul 1,236 locomotives of OA... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password