| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive hydraulic shock absorber in which an inner tube directly slides with an inner diameter sliding surface of an outer tube, capable of simultaneously improving sliding performance between the outer tube and the inner tube and preventing wear thereof.SOLUTION: A hydraulic shock absorber 10 includes an inner tube 12 slidably inserted into an inner diameter sliding surface 11A of the outer tube 11. A number of depressions 100 are formed by dimpling in the circumferential direction and axial direction of the inner diameter sliding surface 11A of the outer tube 11 respectively. |
