Matched context for pumping and back-flow

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

Share - pumping	Share - back-flow	Phrase
0.19%	9.86%	fluid {pumping or back-flow}
0.22%	6.55%	fuel {pumping or back-flow}
0.04%	27.51%	prevent {pumping or back-flow} [perform operation]
0.07%	4.08%	air {pumping or back-flow}
0.02%	2.52%	not {pumping or back-flow}
0.09%	7.24%	oil {pumping or back-flow}