A VCO having an automatic amplitude control circuit In the form of a sensing amplifier provided in the feedback loop to sense the oscillator amplitude and draw current away only when the positive peak voltage Is above a certain value. The quintessence of the present invention is that the major part of the final amount of anionic clay is formed after shaping, i. The transmission configuration is used to realize the high-density digital storage in which the irregular lens is designed to work as a phase-mismatch adjustor and read out the whole stored image with no distortion and loss. The insert has a workpiece support feature that can support andor secure the workpiece into the proper position and orientation for machining.