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The device is known as an extractor hood in the United Kingdom, as a range hood in the United States, and as a rangehood in Australia. It is also called a stove hood, hood fan, cooker hood, vent hood, or ventilation hood. Other names include cooking canopy, extractor fan, fume extractor, and electric chimney.
An office for retailing Philips radios was opened in New Zealand in 1927, but by the early 1930s the market was demanding radios with Superheterodyne capabilities—something Philips did not have. They turned to Radio Corp to build them a suitable line of radios, and in 1934 the first three models (5H, 5V and 6V) were released to supplement ...
Coiled tubing skid-mount unit. Coiled tubing reels Coiled Tubing Unit (CTU). In the oil and gas industry, coiled tubing refers to a long metal pipe, normally 1 to 3.25 in (25 to 83 mm) in diameter which is supplied spooled on a large reel.
[1] [2] Spark-gap transmitters were the first type of radio transmitter, and were the main type used during the wireless telegraphy or "spark" era, the first three decades of radio, from 1887 to the end of World War I. [3] [4] German physicist Heinrich Hertz built the first experimental spark-gap transmitters in 1887, with which he proved the ...
An induction coil consists of two coils of insulated wire wound around a common iron core (M). [1] [7] One coil, called the primary winding (P), is made from relatively few (tens or hundreds) turns of coarse wire. [7] The other coil, the secondary winding, (S) typically consists of up to a million turns of fine wire (up to 40 gauge). [8] [1] [7]
On 5 October 1911, the Post and Telegraph Corps was formed from personnel in the Post and Telegraph Department. On 1 June 1921, the Post and Telegraph Corps became the New Zealand Corps of Signals, with attached depots in various parts of the country. [2] New Zealand had the following signal units that operated during the Second World War: [2]