{HEAD ~ Both sets} are stationary with {TAIL ~ respect} to a transmission housing, i.e. there is no sliding motion of any gear 
are stationary with
{ HEAD ~ Both sets } are stationary with { TAIL ~ respect } to a transmission housing , i.e. there is no sliding motion of any gear
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH