US PATENT SUBCLASS 238 / 81
.~.~.~ Circular

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

29  DF  TIES {9}
54  DF  .~ Cross section {6}
70  DF  .~.~ Tubular {4}
81.~.~.~ Circular

DEFINITION

Classification: 238/81

Ties which are circular or elliptical in cross-section.