US PATENT SUBCLASS 303 / 14
.~ Double heading

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303 /   HD   FLUID-PRESSURE AND ANALOGOUS BRAKE SYSTEMS

13  DF  MULTIPLE CONTROL {2}
14.~ Double heading

DEFINITION

Classification: 303/14

Devices in which, while there is a plurality of means for controlling the distribution of the fluid, when the system is in operation the control is assumed by one, the others being suppressed.