US PATENT SUBCLASS 73 / 23.42
.~.~ Detail of gas handling means


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73 /   HD   MEASURING AND TESTING

23.2  DF  GAS ANALYSIS {15}
23.35  DF  .~ Gas chromatography {7}
23.42.~.~ Detail of gas handling means


DEFINITION

Classification: 73/23.42

Detail of gas handling means:

(under subclass 23.35) Subject matter wherein significance is attributed to the means for confining, directing, or controlling the flow of gaseous material.