spring-relief valve
51wind instrument — /wind/ a musical instrument sounded by the breath or other air current, as the trumpet, trombone, clarinet, or flute. [1575 85] * * * ▪ music Introduction any musical instrument that uses air as the primary vibrating medium for the… …
52HMS Affray (P421) — HMS Affray (P421), a British Amphion class submarine was the last Royal Navy submarine to be lost at sea, on 16 April 1951, with the loss of 75 lives. All vessels of her class were given names beginning with the letter A; she was the only ship of …
53Evacuation slide — An evacuation slide is an inflatable slide used to evacuate an aircraft quickly. An escape slide is required on all commercial (passenger carrying) aircraft where the door sill height is such that, in the event of an evacuation, passengers would… …
54Submarine — For other uses, see Submarine (disambiguation). A Japan Maritime Self Defense Force Oyashio class submarine in 2006 A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which… …
55pneumatic device — Any of various tools and instruments that generate and use compressed air. Examples include rock drills, pavement breakers, riveters, forging presses, paint sprayers, blast cleaners, and atomizers. Compressed air power is flexible, economical,… …
56Gastroesophageal reflux disease — Acid reflux redirects here. Acid reflux may also refer to Laryngopharyngeal reflux. Gastroesophageal reflux disease Classification and external resources ICD 10 K21 ICD 9 …
57Chelmsford — For other uses, see Chelmsford (disambiguation). Coordinates: 51°44′10″N 0°28′47″E / 51.7361°N 0.4798°E / 51.7361; 0.4798 …
58Operation Sandblast — Part of Cold War (1953–1962) …
59Cluster headache — Classification and external resources The Cluster Headache by JD Fletcher ICD 10 G44 …
60Tang Dynasty — For the band, see Tang Dynasty (band). Tang 唐 ← …
