Matched context for draw back and originate

The page lists matched contexts for draw back and originate.

Share - draw back	Share - originate	Phrase
9.46%	5.77%	system [location] {draw back or originate}
10.39%	4.55%	chamber [location] {draw back or originate}
8.76%	4.93%	cylinder [location] {draw back or originate}