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To make an electromagnet you need to send a current through the wire.
为了做成电磁体你需要对金属线送电。
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This current by controlling the electromagnet to control the mechanical movement.
这样通过控制电磁铁的电流就控制了机械运动。
youdao
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This current by controlling the electromagnet to control the mechanical movement.
这样通过控制电磁铁的电流就控制了机械运动。
youdao