Matched context for purifier and recirculation

The page lists matched contexts for purifier and recirculation.

Share - purifier	Share - recirculation	Phrase
32.35%	12.53%	exhaust [physical/chemical] {purifier or recirculation}
20.06%	10.69%	gas {purifier or recirculation}
4.31%	0.48%	exhaust [physical/chemical] {purifier or recirculation}
1.61%	0.21%	{purifier or recirculation} chamber
1.62%	0.13%	{purifier or recirculation} downstream
1.63%	0.05%	{purifier or recirculation} [does] comprise
0.96%	0.07%	{purifier or recirculation} [does] have
1.56%	0.10%	air {purifier or recirculation}
1.38%	0.11%	include {purifier or recirculation} [perform operation]