Matched context for pre-heating and stratify

The page lists matched contexts for pre-heating and stratify.

Share - pre-heating	Share - stratify	Phrase
40.29%	11.82%	{pre-heating or stratify} fuel [perform operation]
25.94%	3.47%	{pre-heating or stratify} air [perform operation]
33.75%	2.54%	provide for {pre-heating or stratify}