A method of selectively applying a pattern to a molded part comprises the steps of forming a mold ; molding a three-dimensional object having at least one face in the mold, the three-dimensional object being formed of a first material. The reception elements are arranged one-dimensionally on a plane so that the reception surfaces face the same direction and that the reception elements are aligned with small intervals in the width direction thereof while longitudinal ends of the reception elements at a certain side are aligned in a straight line. This coating composition enables to form a hardened film of high transparency, of high insulation and of low dielectricity. The latter includes a device to generate a digital word representing the non-integer ratio between the period of the reference signal and the period of the output signal, the reference signal and the output signal respectively corresponding to the first and second signal, and the fixed integer part N being equal to the integer part of the target non-integer ratio. A drive assembly is provided with first and second drive mechanisms such as submersible servos that each drive input arms attached to the fluid outlet manifold at an angular offset such as about 120 degrees.