Pneumatic and hydraulic control mechanisms for motors and engines; electric devices, namely, electric openers and closers for operating [ doors, windows, ] shutters, blinds, curtains, screens, [ ventilation hatches, locks, garage doors, gates, barriers, grills and retractable bollards; ] electric or electronic motors for operating [ doors, windows, ] shutters, blinds, curtains, screens, [ ventilation hatches, locks, garage doors, gates, barriers, grills and retractable bollards; ] motor reducers for operating [ doors, windows, ] shutters, blinds, curtains, screens [, ventilation hatches, locks, garage doors, gates, barriers, grills and retractable bollards ]