手順 15を翻訳中
手順15
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Taking care not to sneeze, we tweeze out the rotor/drive gear.
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Snuggled up against a penny, this drive gear looks quite inconsequential, but the rotor's permanent magnet enables it to rotate 180 degrees with each pulse of the coil.
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Extreme miniaturization means this watch draws very little power—with this configuration, it should last years on a single charge. Apple's claim of "all-day battery life" seems a mite conservative.
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