Explosion-proof electric heating elements, wellhead electromagnetic heating units, mine explosion-proof electric thermal air furnaces, far-infrared thermal air furnaces, high and low voltage electrical control cabinets, electric tracing heating tapes, pressure vessels, heat exchangers, electric hot water boilers, air-source heat pumps, instruments and meters, petrochemical electric heating equipment, wires and cables, electric heating rods, power testing instruments, thermal oil heaters, transformers, pump, valve manufacturing and sales.