Matched context for ventilation and drainage

The page lists matched contexts for ventilation and drainage.

Share - ventilation	Share - drainage	Phrase
7.77%	7.19%	{ventilation or drainage} opening
5.11%	8.71%	{ventilation or drainage} passage
9.40%	1.89%	{ventilation or drainage} line
4.05%	3.21%	{ventilation or drainage} device
5.40%	1.96%	{ventilation or drainage} channel
2.74%	3.14%	{ventilation or drainage} hole
2.05%	3.24%	{ventilation or drainage} chamber
7.73%	0.76%	{ventilation or drainage} system
2.83%	1.41%	{ventilation or drainage} conduit
1.45%	0.82%	{ventilation or drainage} means
2.11%	0.72%	provide {ventilation or drainage} [perform operation]