US PATENT SUBCLASS 105 / 357
.~.~ Vacuum wall

Current as of: June, 1999
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105 /   HD   RAILWAY ROLLING STOCK

238.1  DF  SPECIAL CAR BODIES {11}
355  DF  .~ Freight {15}
357.~.~ Vacuum wall

DEFINITION

Classification: 105/357

(under subclass 355) Freight-cars with double walls, from between which the air may be exhausted to stabilize the interior temperature of the car.