Techniques for disambiguating touch data and determining user assignment of touch points detected by a touch sensor are described. This pump alternatively provokes the inversion of the external pressure intake towards the front areas of the end chambers and the inversion of the pressure intake of the water rejected by the membrane towards the rear areas of said chambers. Accessories for the present invention are anticipated and may include a tool slot for tweezers and an exterior flashlight. A driver can grasp the necessary amount of compilation as an intuitive amount while observing the steering characteristics diagram on a display. Optionally, a second spindle on the opposite side of the anvil predrills the pocket hole when the table is first moved to a predrill position. The resulted configuration prevents the etching of the aluminum film from the insulating film side even if the etchant of aluminum enters the recessed portion at the edge of the active layer during the patterning of the gate electrode.