和平主义
发表于 2025-3-25 07:14:06
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变形
发表于 2025-3-25 09:37:08
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圆锥
发表于 2025-3-25 15:41:50
Integrated Circuit Authenticationmounted 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.
anaerobic
发表于 2025-3-25 17:53:28
Alan F. Murray,H. Martin Reekiely efficient; in fact large (> 1 MW) induction motors have efficiencies of up to 98%. Their biggest drawback hitherto has been their small range of operating speeds, though this is changing with the introduction of solid-state, variable-frequency drives. Table 17.1 shows typical characteristics for a small and a large squirrel-cage motor.
误传
发表于 2025-3-25 23:11:03
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debouch
发表于 2025-3-26 04:06:14
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Thrombolysis
发表于 2025-3-26 05:55:24
Stuart A. Anfang M.D.,Benjamin Liptzin M.D.gardless of the mode of excitation, what is indispensable in all electrical machines is relative motion of an electrical conductor and a magnetic field and we shall start by looking at a very simple example.
Entreaty
发表于 2025-3-26 12:12:26
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发起
发表于 2025-3-26 14:58:51
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obstinate
发表于 2025-3-26 20:41:02
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