According to the description, this is a lesion caused by thrips. It should be sprayed with pesticides, such as ethyl spinosyn plus nitenpyram spray; thiamethoxam plus lambda-cyhalothrin spray.
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The frequency of the ultrasonic energy meter is 1 megahertz (1 million Hz / s), the direction is accurate, and the penetration is strong. Through the three major effects of sound waves (mechanical, warm, physical and chemical effects) on various parts of the human body, to achieve the role of massage relaxation.
Ultrasound Treatment, Healthcare Ultrasound, Medical Ultrasound, Therapeutic Ultrasound
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