Coarctation
发表于 2025-3-21 19:55:18
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Entropion
发表于 2025-3-21 21:00:23
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充足
发表于 2025-3-22 01:05:25
Transformers,mounted transformers for portable instruments. Besides their high efficiencies, they are also notable for their reliability and freedom from the need for maintenance — virtues stemming from their lack of moving parts. AC became standard partly because transformers have these attractive properties, relegating DC to special purposes.
neologism
发表于 2025-3-22 07:03:30
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engagement
发表于 2025-3-22 12:43:08
https://doi.org/10.1007/978-3-319-98587-9f output voltage to input voltage is written.where A. (= |./.|) is the amplitude response and ϕ the phase response of the circuit. Conventionally these are displayed together on a Bode diagram., which is a plot of voltage gain (in dB, or 20log.A.) and phase against log frequency.
Palate
发表于 2025-3-22 16:06:40
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Palate
发表于 2025-3-22 19:17:23
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推延
发表于 2025-3-22 21:30:45
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无礼回复
发表于 2025-3-23 01:34:04
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endarterectomy
发表于 2025-3-23 08:24:22
Alan F. Murray,H. Martin Reekie electrical machines. They are large, not only because we need vast quantities of electricity, but also because large generators are cheaper per MW to construct and to operate, and are more efficient than small generators. A synchronous generator rated at 1000 MVA should turn more than 98% of the mechanical power input into electrical power.