Matched context for open up and close off

The page lists matched contexts for open up and close off.

Share - open up	Share - close off	Phrase
11.61%	3.18%	valve [does] {open up or close off}
9.84%	2.26%	{open up or close off} passage [perform operation]
6.34%	2.05%	{open up or close off} bore [perform operation]
17.80%	0.74%	{open up or close off} valve [perform operation]
5.45%	1.39%	{open up or close off} space [perform operation]
6.29%	0.92%	{open up or close off} conduit [perform operation]
5.43%	0.92%	{open up or close off} path [perform operation]
7.19%	0.46%	side [location] {open up or close off}
5.55%	0.40%	{open up or close off} area [perform operation]