Matched context for backflow and egress

The page lists matched contexts for backflow and egress.

Share - backflow	Share - egress	Phrase
22.00%	6.43%	prevent {backflow or egress} [perform operation]
6.36%	4.48%	fuel {backflow or egress}
3.20%	5.37%	fluid {backflow or egress}
4.28%	4.00%	gas {backflow or egress}
0.93%	10.15%	allow {backflow or egress} [perform operation]
1.08%	6.52%	air {backflow or egress}