effective area of reinforcement
71Union of Soviet Socialist Republics — a former federal union of 15 constituent republics, in E Europe and W and N Asia, comprising the larger part of the former Russian Empire: dissolved in December 1991. 8,650,069 sq. mi. (22,402,200 sq. km). Cap.: Moscow. Also called Russia, Soviet …
72Loudspeaker — For other uses, see Loudspeaker (disambiguation). An inexpensive, low fidelity 3½ inch speaker, typically found in small radios …
73Reinforced concrete — is concrete in which reinforcement bars ( rebars ), reinforcement grids, plates or fibers have been incorporated to strengthen the concrete in tension. It was invented by French gardener Joseph Monier in 1849 and patented in 1867.[1] The term… …
74Battle of Yarmouk — Infobox Military Conflict caption=Across the ravines lies battlefield of Yarmouk, a picture taken 8 miles from battlefield, from Jordan. conflict=Battle of Yarmouk partof=the Muslim conquest of Syria and Byzantine Arab Wars date=15th 20th August …
75Battle of Cape Esperance — Infobox Military Conflict conflict=Battle of Cape Esperance caption=The heavily damaged Japanese cruiser Aoba disembarks dead and wounded crewmembers near Buin, Bougainville and the Shortland Islands a few hours after the battle on October 12,… …
76Operation Lam Son 719 — Part of the Vietnam War Map showing fire support bases and movement of forces …
77harbours and sea works — Introduction harbour also spelled harbor any part of a body of water and the manmade structures surrounding it that sufficiently shelters a vessel from wind, waves, and currents, enabling safe anchorage or the discharge and loading of… …
78Eighty Years' War — Relief of Leiden after the siege, 1574. Date 1568 1648 Location …
79Company of Heroes — Developer(s) Relic Entertainment …
80immune system — Anat. a diffuse, complex network of interacting cells, cell products, and cell forming tissues that protects the body from pathogens and other foreign substances, destroys infected and malignant cells, and removes cellular debris: the system… …
