A type of fan outfit used to remove dust and smoke from shop buildings ashore The usual method of construction for fans of this type consists of a metal ring with arms supporting an electric motor, the shaft of which is centered on the ring The fan is mounted on the motor shaft and is made the full diameter of the ring less a small clearance at the tips of the blades
[ ig-'zost ] (verb.) 1533. Latin exhaustus, past participle of exhaurire, from ex- + haurire to draw; akin to Middle High German [oe]sen to empty, Greek auein to take.