US PATENT SUBCLASS 238 / 23
.~.~ Tapered

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

17  DF  GUARDRAILS {5}
22  DF  .~ Spacers {1}
23.~.~ Tapered

DEFINITION

Classification: 238/23

(under subclass 22) except that the spacing blocks are formed of tapering wedge-blocks for adjustment of the guard-rails.