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