power line carrier blocking
31Presidential Unit Citation (United States) — Presidential Unit Citation Army and Air Force P.U.C …
32History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …
33Russia — /rush euh/, n. 1. Also called Russian Empire. Russian, Rossiya. a former empire in E Europe and N and W Asia: overthrown by the Russian Revolution 1917. Cap.: St. Petersburg (1703 1917). 2. See Union of Soviet Socialist Republics. 3. See Russian… …
34Calendar of 2002 — ▪ 2003 January I will not wait on events while dangers gather. I will not stand by as peril draws closer and closer. The United States of America will not permit the world s most dangerous regimes to threaten us with the world s most destructive… …
35Royal Navy — This article is about the Royal Navy of the United Kingdom. For other Royal Navies, see Royal Navy (disambiguation). Royal Navy The naval ensign …
36Solar thermal energy — Solar thermal system for water heating in Santorini, Greece …
37List of Eyeshield 21 characters — Contents 1 Main characters 2 Opponents 2.1 Ojo White Knights 2.1.1 Seijuro Shin 2.1.2 Haruto …
38History of the United States Navy — United States Navy …
39American football — For other uses, see American football (disambiguation). American football The U.S. Naval Academy Midshipmen (left) face off against the …
40Naval mine — Polish wz. 08/39 contact mine. The protuberances around the top of the mine, called Hertz horns, are part of the detonation mechanism …
