US PATENT SUBCLASS 122 / *
.~.~.~ Front and rear header

Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

235.11  DF  WATER TUBE {52}
*  DD  .~ Rearwardly inclined {1}
*  DD  .~.~ Over firebox {1}
*.~.~.~ Front and rear header {1}
303  DF  .~.~.~.~> Transverse drum