| 摘要 |
Two motors (12, 14) are arranged on opposing sides of a common shaft (16), drive plates (30, 32) of the pump/motors (12, 14) being rigidly coupled to each other, for example by being in hard contact with opposing sides of the shaft (16). Control means are provided for selectively moving the two pump/motors substantially simultaneously to a selected displacement angle, using mechanical systems alone and in combination with hydraulic systems.</S DOAB>
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