The number of {TAIL ~ sprags} 80 is equal to {HEAD ~ the number} of sprags 40, while the clutch teeth 78 are equal in number to the clutch teeth 20 
The number of { TAIL ~ sprags } 80 is equal to { HEAD ~ the number } of sprags 40 , while the clutch teeth 78 are equal in number to the clutch teeth 20
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH