US PATENT SUBCLASS 122 / *
.~ Blow off

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

379  DF  CLEANING {9}
*.~ Blow off {3}
381  DF  .~.~> Bottom and surface
382  DF  .~.~> Bottom {1}
389  DF  .~.~> Surface exit