см. включает следующие основные разделы
The instrument compartment houses the primary onboard equipment and rocket engines of the spacecraft, employed during orbital flight.
It is cheap and widely available, being one of the principal products of the chemical industry…
Two major reentry trajectories
The main research satellites launched by the USA are…
Self-excited vibratory system consists of three basic elements…
…and for a long time to come such rockets will be the chief vehicle used for travel within the solar system.