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