Matched context for proportional and piezoelectric

The page lists matched contexts for proportional and piezoelectric.

Share - proportional	Share - piezoelectric	Phrase
5.78%	1.40%	{proportional or piezoelectric} [physical/chemical] valve
0.20%	29.50%	{proportional or piezoelectric} [physical/chemical] element
0.76%	0.43%	{proportional or piezoelectric} [physical/chemical] circuit
0.51%	0.67%	{proportional or piezoelectric} [physical/chemical] means
0.14%	3.57%	{proportional or piezoelectric} [physical/chemical] sensor
0.21%	0.18%	{proportional or piezoelectric} [physical/chemical] system