| 摘要 |
PROBLEM TO BE SOLVED: To easily replace a hydraulic suspension unit. SOLUTION: The hydraulic suspension unit 20 arranged on a support pipe is provided with a piston 24 arranged in a cylinder 21 and a piston rod 27 projecting from the cylinder 21 by being connected to the piston 24 and being removably connected to a sliding pipe end part, and cushioning coil springs 36 and 38 are incorporated into the cylinder 21.
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