Matched context for header and purifier

The page lists matched contexts for header and purifier.

Share - header	Share - purifier	Phrase
5.00%	32.35%	exhaust [physical/chemical] {header or purifier}
5.03%	4.31%	exhaust [physical/chemical] {header or purifier}
0.73%	20.06%	gas {header or purifier}
1.71%	1.56%	air {header or purifier}
0.61%	1.61%	{header or purifier} chamber
0.36%	0.96%	{header or purifier} [does] have
0.34%	1.38%	include {header or purifier} [perform operation]