開關(guān) （一類電子元件） 編輯
開關(guān)的詞語解釋為開啟和關(guān)閉。它還是指一個可以使電路開路、使電流中斷或使其流到其他電路的電子元件。zui常見的是讓人操作的機(jī)電設(shè)備，其中有一個或數(shù)個電子接點。接點的“閉合"（closed）表示電子接點導(dǎo)通，允許電流流過；的“開路"（open）表示電子接點不導(dǎo)通形成開路，不允許電流流過。
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