Abstract: Provided is a duct docking device for a ventilation seat of a vehicle. The duct docking device enables air to be easily blown to a seatback and a seat cushion with a passenger in a seat using only one blower by enabling a seatback duct mounted at the seatback and a seat cushion duct mounted at the seat cushion to be hermetically docked through a connector duct, etc. at an unfolded position of the seatback in which a passenger can sit, and by enabling the seatback duct mounted at the seatback and the seat cushion duct mounted at the seat cushion to be separated from each other at a folded position of the seatback in consideration of that there is no passenger in the seat.

Abstract: A plurality of finishing mills for finish rolling a rolled material are arranged in a row to construct a finishing mill group, 1st to 3rd surface coolers for cooling the surfaces of the rolled material are provided on the entrance side of the 1st to 3rd finishing mills of the fishing mill group, and the range of cooling of the rolled material by the surface coolers are set to be a range of 0.3 to 1.5 m toward the upstream side from a position separated by 1.5 m or less from the center of the work rolls of each of the finishing mills toward the entrance side of each of the finishing mills.