| 摘要 |
In a structure for an automatic transmission wherein a brake is arranged in a casing, a hydraulic servomechanism for actuating the brake includes a cylinder, a piston, a return spring for biasing the piston and including an annular portion abutting on the piston and a plurality of leaf-spring portions protruding outward equiangularly from the outer periphery of the annular portion, and a plurality of pressing portions formed with the piston and abutting on the servomechanism through clearances between the leaf-spring portions of the return spring.
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