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