The gas passes through the clearance between the third adsorption chamber and the partition II and the wall of the under prop cover, {HEAD ~ the air inlet hole} at {TAIL ~ the bottom} of the under prop cover and evenly enters the second adsorption chamber and the first adsorption chamber filled with fine carbon particles 
at
The gas passes through the clearance between the third adsorption chamber and the partition II and the wall of the under prop cover , { HEAD ~ the air inlet hole } at { TAIL ~ the bottom } of the under prop cover and evenly enters the second adsorption chamber and the first adsorption chamber filled with fine carbon particles
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