HY HUANYANG

Electric, electronic, or electrochemical oxygen monitors and sensors for environmental use; Electrical controlling devices; Electronic alert system for scuba divers comprised primarily of computer software, electric transducer, vibrating motor, antenna and lights for the purpose of requesting the dive partner's attention through vibration, sound and illumination; Electronic frequency converters for high velocity electro motors; Electronic power supplies for driving electric motors; Encoders; Frequency converters; Infrared detection apparatus; Instruments for measuring length; Inverters; Laser measuring systems; Photoelectric sensors; Power amplifiers; Pressure sensors; Pressure transducers and transmitters that convert hydraulic or pneumatic pressure into analog electrical signals for monitoring and controlling hydraulic or pneumatic systems; Proximity sensors; Semiconductor devices