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Feature 1: short time of inflating operation, inflating shaft and paper tube can be separated and placed in only 3 seconds to complete the inflating and deflating, and no need to separate any part of the end of the shaft can be tightly occluded with the paper tube. 2: paper tube placement is simple: by inflating and deflating action, the paper tube can be moved and fixed in any position on the axis. 3: bearing weight: according to the actual needs of customers to determine the size of the shaft diameter, and the use of high-hardness steel, so that the load-bearing weight increase. 4: High Economic Efficiency: shaft design for a special function, for thick, thin, wide, narrow all kinds of paper tube can be applied. 5: Simple Maintenance, long use time: the inflation shaft for a single part, the structure of each part are fixed specifications, can be used interchangeably, so that its maintenance is convenient.