| 摘要 |
A treadmill includes a base, two axles, two pedal units and a coordinating unit. The axles are provided on the base so that they point downwards as they extend away from each other. Two pedal units each pivotally connected to a related one of the axles. The coordinating unit includes a lever and two connectors. The lever is pivotally connected to the base. Each of the connectors is used to connect the lever to a related one of the pedal units.
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