| 摘要 |
An air pump is disclosed to include a plurality of pumping units. Each pumping unit has an air cylinder and a piston rod adapted to be reciprocated in the air cylinder to pump air. A rotating device is adapted to reciprocate the piston rods of the pumping units at the same time when rotated. And a driving device is provided at a side of the rotating device and adapted to rotate the rotating device.
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