28Khz Ultrasonic Plastic Handware Reviting Welding for Auto Soundproof Insulation Cotton Description: Ultrasonic spot welder welding principle is to convert 50/60 Hz current into 20, 28, 35 kHz ...View More
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28 Khz Ultrasonic Plastic Welding Machine Handware Reviting For Auto Soundproof Insulation Cotton