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A trench drain (also channel drain, line drain, slot drain, linear drain, or strip drain) is a specific type of floor drain containing a dominant trough- or channel-shaped body. It is used for the rapid evacuation of surface water or for the containment of utility lines or chemical spills. Employing a solid cover or grating that is flush with ...
Battle of Dien Bien Phu. The Battle of Điện Biên Phủ was a climactic confrontation of the First Indochina War that took place between 13 March and 7 May 1954. It was fought between the French Union 's colonial Far East Expeditionary Corps and Viet Minh communist revolutionaries.
Entrance sign at the tunnels. Part of the tunnel complex at Củ Chu, this tunnel has been made wider and taller to accommodate tourists. The tunnels of Củ Chi (Vietnamese: Địa đạo Củ Chi) are an immense network of connecting tunnels located in the Củ Chi District of Ho Chi Minh City (Saigon), Vietnam, and are part of a much larger network of tunnels that underlie much of the country.
Drainage. High-density polyethylene pipe installation in a storm drain project, Mexico. Drainage is the natural or artificial removal of a surface's water and sub-surface water from an area with excess water. The internal drainage of most agricultural soils can prevent severe waterlogging (anaerobic conditions that harm root growth), but many ...
Võ Nguyên Giáp. Võ Nguyên Giáp (Vietnamese pronunciation: [vɔ̌ˀ ŋʷīən jǎːp]; 25 August 1911 – 4 October 2013) was a Vietnamese general, communist revolutionary and politician. Regarded as one of the greatest military strategists of the 20th century, [1][2] Giáp led Vietnamese communist forces to victories in wars against Japan ...
First Indochina War; Part of the Indochina Wars, the Cold War, and the decolonization of Asia: Clockwise from the top: After the fall of Dien Bien Phu, supporting Laotian troops fall back across the Mekong River into Laos; French Marine commandos wade ashore off the Annam coast in July 1950; M24 Chaffee American light tank used by the French in Vietnam; Geneva Conference on 21 July 1954; A ...
The earliest forms of French drains were simple ditches that were pitched from a high area to a lower one and filled with gravel. These may have been invented in France [3] but Henry Flagg French (1813–1885) of Concord, Massachusetts, a lawyer and Assistant U.S. Treasury Secretary described and popularized them [4] in Farm Drainage (1859). [5]
November 2002; 21 years ago. ( 2002-11) The Vietnamese Wikipedia ( Vietnamese: Wikipedia tiếng Việt) is the Vietnamese-language edition of Wikipedia, a free, publicly editable, online encyclopedia supported by the Wikimedia Foundation. Like the rest of Wikipedia, its content is created and accessed using the MediaWiki wiki software.