roof supports
41Shortwall mining — A form of underground mining that involves the use of a continuous mining machine and movable roof supports to shear coal panels 150 to 200 feet wide and more than half a mile long. Although similar to longwall mining, shortwall mining is… …
42Powertrack — (UK) and Speedtrack (US) are brandnames for Matchbox s foray into toy slot cars. Introduced in the late 1970s Powertrack/Speedtrack featured cars that could be seen in the dark as the cars had headlights. Matchbox s H0/00 (approx. 1/64th) cars… …
43architecture — /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… …
44building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …
45Western architecture — Introduction history of Western architecture from prehistoric Mediterranean cultures to the present. The history of Western architecture is marked by a series of new solutions to structural problems. During the period from the… …
46Construction of Assembly Hall (Champaign) — The construction of the Assembly Hall (Champaign) consisted of building a huge indoor arena with a 400 foot diameter (120 m) concrete dome whose center height is 125 feet (38 m) above the center floor which weighs 10 million pounds.[1]… …
47Tent — For the tetanus neurotoxin (TeNT), see Tetanospasmin. A modern two person, lightweight hiking dome tent; it is tied to rocks as there is nowhere to drive stakes on this rock shelf A tent is a shelter consisting of sheets of fabric or other… …
48arts, East Asian — Introduction music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature. Some studies of East Asia… …
49Solar panel — Photovoltaic module redirects here. For the heat collectors, see Solar thermal collector. An installation of solar panels in rural Mongolia …
50Truss — For other uses, see Truss (disambiguation). In architecture and structural engineering, a truss is a structure comprising one or more triangular units constructed with straight members whose ends are connected at joints referred to as nodes.… …
