US PATENT SUBCLASS 261 / 105
.~.~ Gas-flow control

Current as of: June, 1999
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261 /   HD   GAS AND LIQUID CONTACT APPARATUS

75  DF  CONTACT DEVICES {11}
100  DF  .~ Porous sheet {4}
105.~.~ Gas-flow control

DEFINITION

Classification: 261/105

Including auxiliary devices for directing the flow of gases.

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