Matched context for twin and dual-circuit

The page lists matched contexts for twin and dual-circuit.

Share - twin	Share - dual-circuit	Phrase
27.83%	15.15%	{twin or dual-circuit} master
3.71%	51.72%	{twin or dual-circuit} system
6.07%	13.16%	{twin or dual-circuit} cylinder
3.96%	1.85%	{twin or dual-circuit} design
1.78%	2.84%	{twin or dual-circuit} pump