“direct-current tachometer”的概念、定义、翻译、参考文献-科学参考

单词	direct-current tachometer
释义	direct-current tachometer [dǝ¦rekt ¦kǝ·rǝnt tǝ`käm·ǝd·ǝr] ^ELECTRICITY A dc generator operating with negligible load current and with constant field flux provided by a permanent magnet, so its dc output voltage is proportional to speed.
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