Numerals 75, 76 and 77 denote a discriminator, a relay and {HEAD ~ a contact} of {TAIL ~ the relay} 76, respectively 
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Numerals 75 , 76 and 77 denote a discriminator , a relay and { HEAD ~ a contact } of { TAIL ~ the relay } 76 , respectively
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH