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開關和保險絲

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開關和保險絲 An electric switch is often on a wall near the door of a room. Two wires lead to the lamp in the room. The switch is fixed in one of them. The switch can cause a break in this wire, and then the light goes. The switch can also join the two parts of the wire again, then we get a light. Switch can control many different things. Small switches control lamps and radio sets because th

怎樣選用轉換開關——轉換開關電氣

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怎樣選用轉換開關——轉換開關電氣

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