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機器人：你知道能隨著室內溫度控制供電頻率、調整馬達的運轉速度，是哪一種馬達呢？ A、發電機 B、傳統馬達 C、變頻馬達 答案是C，你答對了嗎？我們來看影片的解說。
#科學 #能源 #氣候 #科技 #自然
分級:
片長:
發音:
發行:
導演:
分級: 普遍級
片長: 1 min
發音: 華語
發行: 2018-01
導演: 安偉民
片長: 48 min
發行: 2013-06
導演: 製作人:宋穎鶯,主持人:何戎
片長: 22 min
發行: 2015-06
導演: 翰星傳播製作
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