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