The inner cylindrical member 40 is clamped between the spring receiving portions 4e of rear cylindrical members 4 and {HEAD ~ connection pipes} 3 screwed on {TAIL ~ end portions} of the rear cylindrical members 4 
The inner cylindrical member 40 is clamped between the spring receiving portions 4e of rear cylindrical members 4 and { HEAD ~ connection pipes } 3 screwed on { TAIL ~ end portions } of the rear cylindrical members 4
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH