Automatic Ultrasonic Cutting Machine Ultrasonic edge cutting machine, Ultrasonic cutting machine, Ultrasonic belt cutting machine, ultrasonic fabric label cutting machine, Ultrasonic roll to sheet cutting machine, ultrasonic magic tape cutting machine Suzhou Flying Man Assembly Automation Co., Ltd. , https://www.flyingmancuttingmachine.com In the shallow parts of many old mining areas in China, old goafs (including flooded wells) are dotted with large amounts of water. Most of them have unclear water accumulation, complicated connection, large water volume, strong acidity and high water pressure. If the production wells approach or collapse to reach the old goaf, it will cause water inrush.