The invention relates to a method for soldering an object comprising several soldered joints. Assigned to each button for each direction is another button to which an anchor is moved according to a directional user input of up, down, right or left. The fluid swirl passage includes a first passage end in communication with a fluid inlet disposed on the vessel top side. The optical repeater transmits the optical signal from the first optical network to the second optical network at the converted bit rate and wavelength. The molds and cores are used in casting metal articles. The data and control flows within an input program are used to influence the process so that the resulting microprocessor is able to efficiently exploit parallelism available within the input program.