Matched context for pull back and push back

The page lists matched contexts for pull back and push back.

Share - pull back	Share - push back	Phrase
19.15%	26.14%	{pull back or push back} piston [perform operation]
19.29%	10.14%	spring [does] {pull back or push back}
20.96%	2.85%	position [location] {pull back or push back}