A weighted apparatus, such as a bat, bar, stick, racket, or club, includes added weight in one end of the apparatus to create an obviously heavy end, and thereby an unbalanced apparatus. In addition, the continuous flow setting unit capable of changing the flow continuously is employed for the supply system of the air, whereas the flow control of the other materials is performed by use of the discrete flow setting units each of which provides the discretized flow by use of the on-off combination of two or more on-off valves. The interface software system extracts the design netlist generated from the APD design of the BGA substrate, and compares this netlist to the user’s netlist.