dust blower
41Vacuum pump — A vacuum pump is a device that removes gas molecules from a sealed volume in order to leave behind a partial vacuum. The vacuum pump was invented in 1650 by Otto von Guericke. Types Pumps can be broadly categorized according to three… …
42Oriel College, Oxford — Colleges and halls of the University of Oxford Oriel College …
43Boiler — For the Limp Bizkit song, see Boiler (song). A portable boiler (preserved, Poland) …
44Crusher — For other uses, see Crusher (disambiguation). A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. Crushers may be used to reduce the size, or change the form, of waste materials so they can be more… …
45BMP-1 — at US Bolling Air Force Base, 1 October 1986. Type Infantry fighting vehicle Place of origin …
46List of Saturday Night Live commercials — The following is a partial list of Saturday Night Live commercial parodies. On Saturday Night Live ( SNL ), a parody advertisement is commonly shown after the host s opening monologue. Fast food, beer, feminine hygiene products, toys, and… …
47Drill bit — For the fictional character, see Drill Bit (Transformers). For the cancelled skyscraper nicknamed Drill bit, see Chicago Spire. For the types used in drilling wells, see Well drilling. From top to bottom: Spade, lip and spur (brad point), masonry …
48Evaporative cooler — An evaporative cooler, photographed in Rocky Ford, Colorado, used in the drier parts of the American West to provide economical cooling …
49Clothes line — For other uses, see Clothesline (disambiguation). Clothes lines in Tripoli, in Northern Lebanon. A clothes line or washing line is any type of rope, cord, or twine that has been stretched between two points (e.g. two sticks), outside or indoors,… …
50Passive house — The term passive house ( Passivhaus in German) refers to the rigorous, voluntary, Passivhaus standard for energy use in buildings. It results in ultra low energy buildings that require little energy for space heating or cooling. [… …
