The bonding area of an outer contact terminal of a connector and the bonding area of an inner contact terminal are rectangular and different in width. In a hemming press step, a punch is further lowered, and a pair of flange portions is inserted into a slit clearance. In one embodiment the PTO includes a linear rack extending along an external portion of the spar and a linear to rotary converter, mounted within the float, including a double sided toothed belt for engaging the rack and causing rotation of the rotary converter to drive an electric generator. The support ring is of a type which when applied on a vehicle wheel enables the vehicle to continue moving for a considerable time even where tire pressure is suddenly lost. The pressure in the liquid refrigerant container is caused to be raised to prevent air from flowing into the insertion port of the liquid refrigerant container from the outside of the vacuum container, and the cryo-cooler is replaced while the pressure in the liquid refrigerant container is greater than that of the outside. In a preferred embodiment, the catalytic beds may be in parallel form, and the plurality of temperature measurements before and after the catalytic beds is considered by a data analyzer for controlling the impure gas for feeding into the purification reactor.