Matched context for spillage and back-flow

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

Share - spillage	Share - back-flow	Phrase
17.88%	27.51%	prevent {spillage or back-flow} [perform operation]
28.77%	6.55%	fuel {spillage or back-flow}
6.12%	7.24%	oil {spillage or back-flow}