US PATENT SUBCLASS 238 / 132
.~ Reversible

Current as of: June, 1999
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238 /   HD   RAILWAYS: SURFACE TRACK

122  DF  RAILS {20}
132.~ Reversible {1}
133  DF  .~.~> Triple head

DEFINITION

Classification: 238/132

The rail heads and bases are identical, so that the rail-treads are reversible.