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        The new ultrasonic vacuum degassing washing machine is a washing machine that does not need washing powder at all. Ultrasonic system, water inlet and outlet device, drying device, stirring device and its including pulsator, motor and control system, power supply device and control system with control panel, etc. It is characterized by a vacuum degassing system and an ultrasonic device. The degassing system consists of a degassing port and a degassing pipeline, a vacuum pump, a vacuum measuring system with a switch circuit, and an airtight degassing vessel and/or an airtight washing vessel. The ultrasonic system includes an ultrasonic transducer (vibrator) and an ultrasonic generator. The ultrasonic transducer (vibrator) is installed around and/or at the bottom of the washing container (inner tub) below the water surface. The principle of the invention is to use a vacuum degassing system to generate degassed water, and the degassed water can wash most of the dirt such as mud and oil under the action of ultrasonic waves, which is much higher than that of ordinary washing powder in ordinary washing machines Effect.