Rotary kiln heat exchangers having precast hub and leg assemblies are disclosed. The controller executes the control for the temperature of cooling water flowing through the cooling water channel in the fuel cell stack. An apparatus that includes a split loading funnel and a process for delivering a gob of molten glass from a gob delivery system into a blank mold using a split loading funnel are also disclosed. The duct receives one end cooling air from the fan and directs the cooling air on to the conveyor chain along the portion thereof located outside the heated baking area of the oven and upstream from the lubricator. A generation section extracts inherent digital information mapped with the determined pseudo-random number sequence. The packing ring contains a plurality of protrusions on the surface that come into contact with the inner pot to prevent the packing ring from sticking to the inner pot.