Matched context for drainage and ventilation

The page lists matched contexts for drainage and ventilation.

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