For this purpose, the invention teaches that on the lower end of the outer part 4 there is a raised portion 6 which acts on {HEAD ~ the end} of {TAIL ~ the first part} 2 and thus effects a clamping or deformation to achieve the clamping 
of
For this purpose , the invention teaches that on the lower end of the outer part 4 there is a raised portion 6 which acts on { HEAD ~ the end } of { TAIL ~ the first part } 2 and thus effects a clamping or deformation to achieve the clamping
OTH OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH