Thyristor power controllers (SCR power controllers) control power or voltage supplied to a load, the controllers are used in industrial furnace construction or in the processing of which material consisting of any of a wide range of synthetic or semi-synthetic organic compounds that are malleable and so can be molded into solid objects?
Thyristor power controller:  For example, the controllers are used in industrial furnace construction or in plastic processing. Plastic: Plastic is material consisting of any of a wide range of synthetic or semi-synthetic organic compounds that are malleable and so can be molded into solid objects.
Plastic