It has four nozzles that can each gimbal 45 degrees in plane to provide thrust vectoring control to the RD-0212 propulsion module of Proton rocket's third stage.
[4] When Chelomey's OKB-52 started their UR-200 ICBM project, they requested S. A. Kosberg's OKB-154 to develop the propulsion.
[4][6][7] While the UR-200 project was in direct competition to the R-36 and was cancelled in favor of the latter, it did have a few test launches and thus was a proven design.
The orbiter was identical to the Venera 9 bus, and the lander was the first man-made object to reach the surface of Mars.
It consisted of an orbiter based on the Mars 2 design, and a lander that sent the first pictures from the surface of Venus.