Matched context for introduction and back-flow

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

Share - introduction	Share - back-flow	Phrase
6.76%	6.55%	fuel {introduction or back-flow}
1.07%	27.51%	prevent {introduction or back-flow} [perform operation]
5.71%	4.08%	air {introduction or back-flow}
2.10%	9.86%	fluid {introduction or back-flow}
2.06%	6.12%	gas {introduction or back-flow}
0.23%	18.94%	{introduction or back-flow} valve
0.55%	7.24%	oil {introduction or back-flow}
0.09%	2.52%	not {introduction or back-flow}