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Barbed wire - Wikipedia ... Barbed wire
Wire obstacle. In the military science of fortification, wire obstacles are defensive obstacles made from barbed wire, barbed tape or concertina wire. They are designed to disrupt, delay and generally slow down an attacking enemy. During the time that the attackers are slowed by the wire obstacle (or possibly deliberately channelled into ...
Concertina wire - Wikipedia ... Concertina wire
This construction technique is one of the most versatile natural building methods and can be used for benches, freestanding walls, emergency shelters, temporary or permanent housing, or barns and commercial buildings. Earthbag is frequently chosen for many small-to-medium-sized institutional structures in the developing world.
Trench warfare - Wikipedia ... Trench warfare
American wire gauge
ISBN. 0806106514. The Wire that Fenced the West is a book written by Henry D. and Frances T. McCallum and published in 1965 by the University of Oklahoma Press . The book covers the history of the development of barbed wire and the inventors. It also include chapters of how it was marketed and the history of its use in the American West.
N2 chart. N 2 chart example. [1] The N2 chart or N2 diagram (pronounced "en-two" or "en-squared") is a chart or diagram in the shape of a matrix, representing functional or physical interfaces between system elements. It is used to systematically identify, define, tabulate, design, and analyze functional and physical interfaces.