It is thus possible to compensate unavoidable tolerances in the spacing between the free end 21 of the glow rod 20 and the face 4 of the filter body 2 with {HEAD ~ the aid} of {TAIL ~ the spiral spring} 26 
of
It is thus possible to compensate unavoidable tolerances in the spacing between the free end 21 of the glow rod 20 and the face 4 of the filter body 2 with { HEAD ~ the aid } of { TAIL ~ the spiral spring } 26
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 OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH