| 摘要 |
An oil pressure braking pump, comprises a supporting frame having a receiving space; a piston and an adjusting unit being received in the receiving space; a handle being installed to the supporting frame; the handle serving to actuate a piston within the supporting frame; the piston being driven by the handle; an adjusting unit having a plurality of elastic units which has different elastic coefficients so as to push a pneumatic pressure device with different stages. The handle can push the piston; and then the piston pushes the adjusting unit to further drive the pneumatic pressure device with different stages.
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