demonstration meter
... demonstration diode 演示用二极管 demonstration meter 演示用电表 density 密度 ...
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本文介绍一种用实验室现成器材组装的示教多用电表，可以很好地做演示实验和讲解其原理。
This text introduces a kind of multi-purpose ammeter assembled from ready-made teaching electric circuit board, which can be used for experiment for demo at experiment for principle-explaining.
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