US PATENT SUBCLASS 122 / *
.~.~ Surface exit

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

412  DF  FEED HEATERS {17}
*  DD  .~ Circulatioon {1}
*.~.~ Surface exit {1}
*  DD  .~.~.~> Mechanical pump {1}