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 NHS health centre in the United Kingdom (Murphy Philipps Architects) A healthcare center, health center, or community health center is one of a network of clinics staffed by a group of general practitioners and nurses providing healthcare services to people in a certain area.