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    PCB engraving machine is a combination of vacuum pump and water ring vacuum pump is a comprehensive parameter and CNC engraving the actual situation, a professional designed for woodworking adsorption, adsorption, glass metal adsorption, need to vacuum adsorption, vacuum traction, vacuum lifting, vacuum batch feeding a set of vacuum negative pressure device. The principle of negative pressure vacuum pump application, processing quickly absorb carvings, prevent the occurrence of offset carving in the processing process, so as to make the products more beautiful carving.