A polyoctatriazacane molecule is disclosed that has a plurality of octatriazacane groups having the structureand a plurality of divalent bridging groups, each divalent bridging group comprising an aromatic group. A folding circuit provides control signals to the varactors in a sequential manner to provide a relatively smooth change in the total capacitance of the oscillator. An elastic contact material 30 has pressure surfaces 32 to be brought into contact with the pressure contact surfaces of the cancel cam, and is biased toward the cancel cam along a guide 6d by a coil spring 11 inserted into a blind hole 12b. Algorithm for getting the needed workpieces to the buffer station is also provided through a controller or a computer mechanism.