US PATENT SUBCLASS 238 / 227
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Current as of: June, 1999
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238 /   HD   RAILWAYS: SURFACE TRACK

151  DF  RAIL JOINTS {28}
218  DF  .~ Tread bridge {7}
227.~.~ Spacer {1}
228  DF  .~.~.~> Expansible


DEFINITION

Classification: 238/227

Filling-in pieces between separated standard-section rail ends.