US PATENT SUBCLASS 210 / 92
.~ Test valve

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

85  DF  WITH ALARM, INDICATOR, REGISTER, RECORDER, SIGNAL OR INSPECTION MEANS {7}
92.~ Test valve

DEFINITION

Classification: 210/92

(under subclass 85) Apparatus including a valve which may be opened for test purposes.