US PATENT SUBCLASS 122 / 9
.~.~ Water tube type


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

6 R  DF  INDUSTRIAL {7}
8  DF  .~ Water firebox {1}
9.~.~ Water tube type


DEFINITION

Classification: 122/9

(under subclass 8) Industrial boilers including a firebox the walls of which are provided with water containing tubes.