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Coal Seam Gas Drainage and Sealing Device: Gas drainage hole packer has all the functions of water injection hole packer, such as water injection, reducing gas content, improving coal humidity and preventing explosion accident. Besides, it ...

Geotechnical Water Permeability Rock Lugeon Test Recorder: Product DescriptionThe integration of automatic grouting recorder is a new generation of grouting recording device developed by our company and Zhejiang University of mechanical design, computer ...

Water Injection Hole Packer: devices, lower the cost and increase the workers' sense of safety. · Breaking coal with water injection hole packer can prevent the explosion of coal and gas effectively. The details of water ...

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Coal Seam Gas Drainage and Sealing Device