Matched context for backflow and ingress

The page lists matched contexts for backflow and ingress.

Share - backflow	Share - ingress	Phrase
22.00%	12.93%	prevent {backflow or ingress} [perform operation]
6.36%	2.48%	fuel {backflow or ingress}
1.33%	6.84%	water {backflow or ingress}
3.20%	2.75%	fluid {backflow or ingress}
1.08%	3.42%	air {backflow or ingress}
1.36%	2.22%	avoid {backflow or ingress} [perform operation]
0.93%	1.95%	allow {backflow or ingress} [perform operation]