TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The predetermined use of the activated hydrogen includes placing the outlet end of the activation bore in fluid connection with the use chamber of pressure-use mechanism(s) for utilizing activated hydrogen pressure resulting from heating the atomized water in the activation bore in the use chamber of the pressure-use mechanism. The method includes atomization-injecting water from the atomizer into the hydrogen activator having internal heat of an activation bore for heat-activating the water hydrogen to pressure levels for achieving hydrogen pressure of superheated steam for intended objective(s); and directing the hydrogen pressure of the superheated steam into the use chamber structured for achieving the intended objective. It includes utilizing a portion of power from a power takeoff from the use chamber for generating electricity to heat the heater element in the activation bore.    TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Component: The pressure-use mechanism includes a predetermined engine. The power takeoff is positioned in power-takeoff connection with the engine. An electrical generator is positioned with operational power transmission from the power takeoff for generating electricity with the electrical generator. Electricity from the electrical generator is transmitted to the electrical source. An atomizer pump is positioned in predetermined fluid-pumping connection from a water source to the atomizer. A return throttle is positioned with controllable return flow of water from an atomizer inlet for forcing throttle-restricted flow of water through the atomizer. The rotational engine has a turbo cam drive with a follower gear having follower teeth extended radially from follower bases in sliding contact with rotationally transverse walls of transverse slots in a transverse guide. The transverse guide is positioned circumferentially intermediate the follower gear and a double-end-cam on an inside periphery of an end-cam sleeve. The follower teeth are in cam-drive contact with alternately opposite-side walls of a counter-inclined channel of the double-end-cam. A drive-piston sleeve is positioned intermediate the follower gear and a drive head of a double-action piston with the drive-piston sleeve in sliding-seal contact with an inside periphery of a drive-head sleeve of a drive-end head of a double-headed power cylinder. The end-cam sleeve has a drive end attached to a drive-shaft plate extended inwardly to a drive shaft in rotational contact with an inside periphery of a drive-shaft bearing in a shaft-housing plate. A front thrust bearing is positioned intermediate the drive-shaft plate and a drive-housing plate. A rear thrust bearing is positioned intermediate the drive-shaft plate and the shaft-housing plate. A base plate is attached to the drive-end head and extended outward radially to a drive-housing sleeve having a drive end attached to the drive-housing plate and a piston end attached to the base plate. The double-action piston is in sliding-seal contact with a sleeve portion of a drive end of the drive-end head and with a sleeve portion of an exhaust end of an exhaust-end head of the double-headed power cylinder. An exhaust-end sleeve is positioned intermediate to an exhaust head and a tie-bolt anchor with the exhaust-end sleeve in sliding-seal contact with an inside periphery of an exhaust-head sleeve of the exhaust-end head. The tie-bolt anchor has exhaust port(s) in fluid connection intermediate an inside periphery of the exhaust-end sleeve and an inside periphery of the exhaust-head sleeve. The double-action piston is hollow intermediate to front piston valve(s) and rear piston valve(s). A front valve aperture of the front piston valve is structured for being open fluid connection intermediate an inside periphery of the drive end of the double-action piston and the drive-end head of the double-headed power cylinder during forward travel of the double-action piston towards the drive-end head and for being closed during rearward travel of the double-action piston towards the exhaust-end head. A rear valve aperture of the rear piston valve is structured for being in open fluid connection intermediate the inside periphery of the exhaust end of the double-action piston and the exhaust-end head during the rearward travel of the double-action piston towards the exhaust-end head and for being closed during the forward travel of the double-action piston towards the drive-end head. An electrical lead for the hydrogen activator in fluid connection with the drive end of the double-headed power cylinder and an electrical lead for the hydrogen activator in fluid connection with the exhaust end of the double-headed power cylinder are in electrical connection with the electrical source. An atomizer for the hydrogen activator in fluid connection with the exhaust end of the double-headed power cylinder is in fluid connection with an activator pump of atomizer pump.