Diaphragm		Jamesbury
	Electric		Apollo, Jamesbury
	Limit Switch		Moniteur, Stonel, Topworx, Westlock
	Piston		Jamesbury
	Positioner		El-O-Matic, Unitorq, Westlock
	Rack & Pinion		Apollo, Jamesbury, Unitorq
	Solenoid		Asco, Skinner