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