US PATENT SUBCLASS 191 / *
.~ Normally dead section

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191 /   HD   ELECTRICITY: TRANSMISSION TO VEHICLES

14  DF  SECTIONAL CONDUCTOR {2}
*.~ Normally dead section {3}
16  DF  .~.~> Magnetomechanical circuit controller
17  DF  .~.~> Magnetic circuit controller {1}
20  DF  .~.~> Mechanical circuit controller {1}