When it is desired to decouple {HEAD ~ the metallic parts} coupled in {TAIL ~ the manner} described above, this can be easily accomplished by nipping the flanges 17 and 27 of the metallic parts with the fingers and pulling them while twisting 
coupled in
When it is desired to decouple { HEAD ~ the metallic parts } coupled in { TAIL ~ the manner } described above , this can be easily accomplished by nipping the flanges 17 and 27 of the metallic parts with the fingers and pulling them while twisting
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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 OTH OTH OTH OTH OTH