R902197748 A2FO10/61R-VPB06
R902193365 A2FO12/61R-PPB06
R902155958 A2FO23/61R-PPB05
R902193369 A2FO28/61R-PPB05
Germany Bosch rexroth, Eaton helwig, alco, oil research in Japan, Taiwan oil of the hydraulic control components, proportional valve, servo valve, plunger pump, gear pump, vane pump, the electromagnetic direction valve, guide rail, slider, servo valve controller, proportional valve amplifier, electrical control components