When an engine is ignited, it produces thrust and boosts the rocket into the sky. After the propellant is used up, delay is activated, producing tracking smoke and allowing the rocket a brief coast.
infirmary (plural infirmaries) 1  A place where sick or injured people are cared for, especially a small hospital; sickhouse. 2  A clinic or dispensary within another institution.
An annex is a building added on to the main structure that adds additional room. An enclosure is an areas that is sealed off with a natural or artificial boundary. An annex is a building added on to the main structure that adds additional room. An enclosure is an areas that is sealed off with a natural or artificial boundary.