commercial weight
71aerospace industry — Introduction assemblage of manufacturing concerns that deal with vehicular flight within and beyond the Earth s atmosphere. (The term aerospace is derived from the words aeronautics and spaceflight.) The aerospace industry is engaged in the …
72architecture — /ahr ki tek cheuhr/, n. 1. the profession of designing buildings, open areas, communities, and other artificial constructions and environments, usually with some regard to aesthetic effect. Architecture often includes design or selection of… …
73Europe, history of — Introduction history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… …
74flight, history of — ▪ aviation Introduction development of heavier than air flying machines. Important landmarks and events along the way to the invention of the airplane include an understanding of the dynamic reaction of lifting surfaces (or wings), building… …
75Boeing 747 — British Airways Bo …
76Handloading — or reloading is the process of loading firearm cartridges or shotgun shells by assembling the individual components (case/shotshell, primer, powder, and bullet/shot), rather than purchasing completely assembled, factory loaded cartridges.… …
77Semi-trailer truck — A semi trailer truck, also known as tractor trailer or (in the United Kingdom and Ireland) articulated lorry, is an articulated truck or lorry consisting of a towing engine ( tractor in the United States, prime mover in Australia, and truck in… …
78Douglas DC-8 — DC 8 redirects here. For the earlier, never built piston engined airplane, see Douglas DC 8 (piston airliner). DC 8 …
79rock — rock1 rockless, adj. rocklike, adj. /rok/, n. 1. a large mass of stone forming a hill, cliff, promontory, or the like. 2. Geol. a. mineral matter of variable composition, consolidated or unconsolidated, assembled in masses or considerable… …
80Rock — /rok/, n. a male given name. * * * I In geology, a naturally occurring and coherent aggregate of minerals. The three major classes of rock igneous, sedimentary, and metamorphic are based on the processes that formed them. These three classes are… …
