During {HEAD ~ installation} of {TAIL ~ the valve} 11, the spring 13 is inserted into the housing 12 and the closing part 16 is then pressed behind the latching 
of
During { HEAD ~ installation } of { TAIL ~ the valve } 11 , the spring 13 is inserted into the housing 12 and the closing part 16 is then pressed behind the latching
OTH HEAD HEAD HEAD HEAD HEAD REL 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