The efficiency of a vapor compression system is increased by coupling the evaporator with either the intercooler of a two-stage vapor compression system or the compressor component. The conductive pads may each include a columnar portion situated at a lower part thereof and a convex portion situated at a higher part thereof, wherein a surface of the convex portion may assume a continual curved shape. It can be adjusted fore and aft, as well as up and down. The word line decoder also comprises a decode line coupled to the local decode line and oriented in the first direction. The club head further includes means for detachably securing the insert to the channel. The liquid retainer is preferably one or more swab cups or oil field retainers.