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