US PATENT SUBCLASS 122 / *
.~.~ Feed heater

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

*  DD  HORIZONTAL CYLINDER {6}
195  DF  .~ Water tube {7}
*.~.~ Feed heater {1}
196  DF  .~.~.~> Check-valved