PHOTOELECTRICAL AUTOCONTROLLING PRESSURE APPARATUS FOR BOILER - PENG GUISEN (1988)
Keywords: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; BLASTING; CONTROLLING; HEATING; LIGHTING; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; MECHANICAL ENGINEERING; METHODS OF STEAM GENERATION; PHYSICS; REGULATING; STEAM BOILERS; STEAM GENERATION; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TARIFF METERING APPARATUS; TESTING; WEAPONS