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Book leans on a mandrel through the end face of the four dovetail connecting four fan-shaped plate, each sector Board at the rear end, through a radical ramp to prevent axial movement, but radial mandrel can be achieved. At the end drum shaft is connected with a rotating cylinder, piston rod of the cylinder driven by the drum shaft lever on the Center front four-sided axial sliding, radial to make fan-shaped Board mandrel. Reels can be increased by attaching a block of four fan-shaped plate nominal diameter. Uncoiler rack can be moved on Rails in the frame, are driven by the hydraulic cylinder, center position control can be achieved. For strengthening stability in roll, drum head design with support arm devices, as when there is a coil on the reel, support arm through the cylinder drive, hold the drum head, usually supports retraction of the boom, will not affect the coil rolled up.