Matched context for prevent back and spill

The page lists matched contexts for prevent back and spill.

Share - prevent back	Share - spill	Phrase
7.78%	32.84%	{prevent back or spill} fuel [perform operation]
22.16%	1.85%	{prevent back or spill} flow [perform operation]
16.84%	1.94%	valve [does] {prevent back or spill}