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.
hospital infirmary a health facility where patients receive treatment armed forces armed services military military machine war machine the military forces of a nation their military is the largest in the region the military machine is the same one we faced in 1991 but now it is weaker