| 摘要 |
A piston, which is provided in a cylinder tube, is connected to a pair of guide rods by the aid of a plate. The guide rods are arranged displaceably in the axial direction along guide holes of the cylinder tube. The displacement of the piston is guided by the guide rods. The guide holes are communicated with the outside via a tube connected to an air hole. The air is sucked into and discharged from the guide holes via the tube in accordance with the reciprocating motion of the piston. |
