см. тж. двигательно-тормозная система
Once the spacecraft has been oriented, the on-board electronic programming device sends a command to switch on the retro-engine …
…I switched on the retro-rocket unit , and the spacecraft obediently left the orbit and started moving towards the Earth.
The non-pressurized part of the compartment houses the liquid-rocket unit designed for orbital and reentry manoeuvres.