Matched context for retraction and centering

The page lists matched contexts for retraction and centering.

Share - retraction	Share - centering	Phrase
6.91%	20.72%	{retraction or centering} spring
2.42%	2.18%	{retraction or centering} force
1.96%	2.27%	{retraction or centering} chamber
1.46%	2.34%	{retraction or centering} device
0.64%	3.26%	{retraction or centering} mechanism
0.68%	2.13%	{retraction or centering} means
0.51%	2.20%	{retraction or centering} unit
0.51%	1.91%	{retraction or centering} assembly
0.34%	0.41%	{retraction or centering} system
0.38%	1.10%	provide {retraction or centering} [perform operation]