Matched context for admission and backflow

The page lists matched contexts for admission and backflow.

Share - admission	Share - backflow	Phrase
6.38%	6.36%	fuel {admission or backflow}
1.32%	22.00%	prevent {admission or backflow} [perform operation]
6.54%	3.20%	fluid {admission or backflow}
12.06%	1.08%	air {admission or backflow}
5.84%	1.92%	{admission or backflow} port
2.20%	4.28%	gas {admission or backflow}
3.90%	2.10%	{admission or backflow} valve
1.63%	1.91%	{admission or backflow} conduit
2.23%	0.93%	allow {admission or backflow} [perform operation]
0.99%	0.85%	{admission or backflow} means