Matched context for escape and back-flow

The page lists matched contexts for escape and back-flow.

Share - escape	Share - back-flow	Phrase
12.57%	27.51%	prevent {escape or back-flow} [perform operation]
4.66%	9.86%	fluid {escape or back-flow}
4.17%	6.12%	gas {escape or back-flow}
2.93%	6.55%	fuel {escape or back-flow}
0.75%	18.94%	{escape or back-flow} valve
1.82%	7.24%	oil {escape or back-flow}
2.31%	4.08%	air {escape or back-flow}