duct sheet
41gastropod — /gas treuh pod /, n. 1. any mollusk of the class Gastropoda, comprising the snails, whelks, slugs, etc. adj. 2. Also, gastropodous /ga strop euh deuhs/. belonging or pertaining to the gastropods. [1820 30; < NL Gast(e)ropoda a class of mollusks.… …
42XB-70 Valkyrie — Infobox Aircraft name=XB 70 Valkyrie type=Strategic bomber Supersonic research aircraft manufacturer=North American Aviation caption= designer= first flight=21 September 1964 introduced= retired= number built=2 XB 70s status=Retired from testing… …
43Pressurisation ductwork — is a fire protection system. It is used to supply a steady stream of fresh air to any area of refuge or designated emergency evacuation or egress route.Purpose* To ensure a positive pressure environment of clean outside air, free from smoke to… …
44Propeller — A propeller is essentially a type of fan which transmits power by converting rotational motion into thrust for propulsion of a vehicle such as an aircraft, ship, or submarine through a mass such as water or air, by rotating two or more twisted… …
45HVAC — may also stand for High voltage alternating current. See also: Glossary of HVAC HVAC systems use ventilation air ducts installed throughout a building that supply conditioned air to a room through rectangular or round outlet vents, called… …
46Native American music — Introduction music of the indigenous peoples of the Western Hemisphere. The Americas contain hundreds of native communities, each with its own distinctive history, language, and musical culture. These communities although united in placing… …
47renal system — ▪ anatomy Introduction in humans (human body), organ system that includes the kidneys, where urine is produced, and the ureters, bladder, and urethra for the passage, storage, and voiding of urine. In many respects the human excretory, or… …
48Stitch and glue — is a simplified boat building method which uses sheet plywood and eliminates the need for stems and chines. [ [http://www.glen l.com/resources/glossary.html Boat terms] ] Plywood panels are cut to detailed profiles and stitched together to form… …
49Deep foundation — A deep foundation installation for a bridge in Napa, California, United States …
50Boeing 787 — infobox Aircraft subtemplate=Infobox Boeing Aircraft name=Boeing 787 Dreamliner caption=Boeing 787 8 Dreamliner at roll out ceremony national origin = United States, with international partners type=Wide body jet airliner manufacturer=Boeing… …
