US PATENT SUBCLASS 122 / *
.~.~.~ Longitudinal upper drum

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

235.11  DF  WATER TUBE {52}
332  DF  .~ Vertical {10}
345  DF  .~.~ Beyond bridge wall {2}
*.~.~.~ Longitudinal upper drum {1}
347  DF  .~.~.~.~> Longitudinal lower drum