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The "Roast-o-Matic" enabled the cook to delay the oven start a particular number of hours. [ 10 ] In 1956, gas ranges included the "oven sentinel," a probe which could be inserted into meat and then would automatically turn off the oven when the desired temperature was reached.
F2 propagation (F2-skip) is the reflection of VHF signals off the F2 layer of the ionosphere. The phenomenon is rare compared to other forms of propagation (such as sporadic E propagation , or E-skip) but can reflect signals thousands of miles beyond their intended broadcast area, substantially farther than E-skip.
On July 17, 1981, two overhead walkways in the Hyatt Regency Hotel in Kansas City, Missouri collapsed, killing 114 people and injuring 216. Loaded with partygoers, the concrete and glass platforms crashed onto a tea dance in the lobby.
During the early 1970s, Aérospatiale initiated a development programme to produce a replacement for the aging Aérospatiale Alouette II. [1] While the Aérospatiale Gazelle, which had been developed in the 1960s and 1970s, had been met with numerous orders by military customers, commercial sales of the type had been less than anticipated, thus the need for a civil-oriented development was ...