Matched context for retarder and proportioning

The page lists matched contexts for retarder and proportioning.

Share - retarder	Share - proportioning	Phrase
6.24%	57.21%	{retarder or proportioning} valve
11.74%	0.91%	{retarder or proportioning} pressure
2.71%	1.70%	{retarder or proportioning} chamber
3.91%	0.47%	{retarder or proportioning} system
4.10%	0.46%	brake {retarder or proportioning}
0.73%	0.24%	{retarder or proportioning} circuit
0.87%	0.63%	{retarder or proportioning} unit
0.69%	0.26%	provide {retarder or proportioning} [perform operation]