Matched context for flap and reversing

The page lists matched contexts for flap and reversing.

Share - flap	Share - reversing	Phrase
5.46%	40.01%	{flap or reversing} valve
1.87%	6.37%	{flap or reversing} switch
1.04%	4.21%	{flap or reversing} lever
1.06%	3.34%	{flap or reversing} position
0.54%	1.59%	{flap or reversing} opening
0.44%	1.01%	provide {flap or reversing} [perform operation]