Matched context for purifying and pumping

The page lists matched contexts for purifying and pumping.

Share - purifying	Share - pumping	Phrase
4.57%	4.25%	{purifying or pumping} [purpose] action
25.54%	0.78%	{purifying or pumping} [purpose] efficiency
11.34%	1.33%	{purifying or pumping} [purpose] device
2.90%	3.65%	{purifying or pumping} [purpose] means
6.64%	1.12%	{purifying or pumping} [purpose] operation