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一個貌似不難的設(shè)計,,你會嗎,? |
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點評
卷簧的芯部是不轉(zhuǎn)的,,完全靠卷簧的變形來使外圈轉(zhuǎn)動,,這樣才能保證芯部的電線不轉(zhuǎn)動
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點評
補充一下,,內(nèi)部是滑環(huán)結(jié)構(gòu),。
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