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31Tainter gate — The Tainter gate is a type of radial arm floodgate used in dams and canal locks to control water flow. It is named for Wisconsin structural engineer Jeremiah Burnham Tainter.cite web title=The Tainter Gate work=Dunn County Historical Society… …
32Michigan Avenue Bridge — viewed from the west Official name DuSable Bridge Carries Motor vehicles, pedestrians …
33steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
34Cinetheodolite — Contraves cinetheodolite electro optical tracking system dome The …
35Valve — This article is about the flow control device. For the game developer, see Valve Corporation. For the electronic component, see Vacuum tube. For other uses, see Valve (disambiguation). These water valves are operated by handles. A valve is a… …
36Chicago River — River Chicago River main branch at dusk in January 2008 (viewed looking east from Wolf Point) …
37Dobsonian telescope — A Dobsonian telescope on display at Stellafane in the early 1980s A Dobsonian telescope is an alt azimuth mounted newtonian telescope design popularized by the amateur astronomer John Dobson starting in the 1960s. Dobson s telescopes featured a… …
38Canon de 75 modèle 1897 — Infobox Weapon is artillery=yes caption= Canon de 75 Modèle 1897 on display in Les Invalides. name= Canon de 75mm Modele 1897 type= Regimental artillery field gun origin= France service= 1897–1945 used by= France, United States, Poland, Belgium,… …
39Dames Point Bridge — The Dames Point Bridge, seen from northbound SR 9A Official name Napoleon Bonaparte Broward Bridge Carries six general purpose lanes …
40Dynamometer — For the dynamometer used in railroading, see dynamometer car .A dynamometer or dyno for short, is a machine used to measure torque and rotational speed (rpm) from which power produced by an engine, motor or other rotating can be calculated.A… …
