A method is provided that solves the problem of the manner of obtainment of mass for production of shaped construction elements. Each pathway involves comparing a voltage, which is representative of an electric current flowing to the motor, to a predetermined maximum voltage, and if the former exceeds the latter using hardware or software to initiate shutting off the motor, such as by shutting off the power inverter. Authentication comparison data is created which is at least partially created through decrypting data embedded in the watermark. The printing engine includes: an engine controller, for performing the warm-up operation based on an instruction received from the warm-up start unit; and a printing unit, for the printing of printing data that are interpreted by the command data processor. The reactor is applicable for treating gases containing hydrogen sulfide. The system can also be configured as a retreater for retreating feedstock.