In the third step of joining of the metal members, the pressing force of the rotational tool under rotation is maintained at the third pressing force that is smaller than the second pressing force until a specified period of time elapses after the tip of the pin portion of the rotational tool has reached the specified point that is at a distance from the joining face. In one form, each projectile assembly further includes an internal wedging surface, at or adjacent the trailing end of said cylindrical extension which accommodates a tapered nose part of a following projectile, for expanding said trailing end into enhanced sealing engagement with the barrel upon engagement of said wedging surface With said tapered nose part. The mating segments are configured to be compressed along the connection axis. The first repair line is disposed on the substrate for repairing at least one of the data lines. Each beverage flow channel effectively functions to receive heat from channel-received beverage before the channel-received beverage exits the primary beverage outlet.