(normal cubic meters per hour)
31Concrete mixer — This portable concrete/mortar mixer has wheels and a towing tongue so that it can be towed by a motor vehicle and moved around the worksite by hand, and its rotation is powered by mains electricity. The lever allows the concrete/mortar to be… …
32Oxy-fuel welding and cutting — Oxyacetylene redirects here. For the song, see Cubanate. Side of metal, cut by oxygen propane cutting torch …
332010 Copiapó mining accident — Copiapó mining accident redirects here. For the 2006 accident in the Carola Agustina mine, see 2006 Copiapó mining accident. 2010 Copiapó mining accident Rescue efforts at San José Mine near Copiapó, Chile on 10 August 2010 Date …
34History of the single-lens reflex camera — The history of the single lens reflex camera predates the invention of photography in 1826/27 by one and a half centuries with the use of a reflex mirror in a camera obscura first described in 1676. Such SLR devices were popular as drawing aids… …
35Oxygen — This article is about the chemical element and its most stable form, O2 or dioxygen. For other forms of this element, see Allotropes of oxygen. For other uses, see Oxygen (disambiguation). nitrogen ← oxygen → fluorine ↑ O ↓ …
36List of unusual units of measurement — For units of measure primarily used in countries where English is not the main language, see the article specific to that country, a list of which can be found in the systems of measurement article. An unusual unit of measurement is a unit of… …
37Manitoba Hydro — Type Crown Corporation Industry Electricity generation, transmission and distribution Natural gas distribution …
38Mount Pinatubo — The eruption column of Mount Pinatubo on June 12, 1991, three days before the climactic eruption. Elevation …
39Delhi Bus Rapid Transit System — Delhi BRTS Info Transit type Rapid transit Number of lines Phase I: 7 (under construction) …
40Bologna — For other uses, see Bologna (disambiguation). Bologna   Comune   Comune di Bologna …
