{TAIL ~ A camera} 1, in which {HEAD ~ the electromagnet} of the detection means is used also to control the shutter closing action 
in
{ TAIL ~ A camera } 1 , in which { HEAD ~ the electromagnet } of the detection means is used also to control the shutter closing action
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH REL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH