Matched context for passing and purifier

The page lists matched contexts for passing and purifier.

Share - passing	Share - purifier	Phrase
2.35%	32.35%	exhaust [physical/chemical] {passing or purifier}
2.35%	20.06%	gas {passing or purifier}
3.54%	1.56%	air {passing or purifier}
0.36%	2.18%	{passing or purifier} temperature