While {HEAD ~ the drive ring} revolving at the slow speed can be coupled with {TAIL ~ the program carrier} in seven different angular positions, for the drive ring which revolves once a day only a single angular position exists in which it can be coupled with the program carrier 
coupled with
While { HEAD ~ the drive ring } revolving at the slow speed can be coupled with { TAIL ~ the program carrier } in seven different angular positions , for the drive ring which revolves once a day only a single angular position exists in which it can be coupled with the program carrier
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH