Matched context for prevent back and intercept

The page lists matched contexts for prevent back and intercept.

Share - prevent back	Share - intercept	Phrase
7.78%	8.16%	{prevent back or intercept} fuel [perform operation]
22.16%	2.83%	{prevent back or intercept} flow [perform operation]
16.84%	3.45%	valve [does] {prevent back or intercept}