Matched context for foaming and back-flow

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

Share - foaming	Share - back-flow	Phrase
7.99%	27.51%	prevent {foaming or back-flow} [perform operation]
20.78%	7.24%	oil {foaming or back-flow}
7.44%	6.55%	fuel {foaming or back-flow}
5.84%	2.52%	not {foaming or back-flow}