US PATENT SUBCLASS 238 / 163
.~ Molten filler

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

151  DF  RAIL JOINTS {28}
163.~ Molten filler

DEFINITION

Classification: 238/163

After the rail-joint is in place a molten filler, usually zinc or lead is poured in between the joint members and the rail ends.