On its downstream side, each fly weight 22 has a sloping face 25 which cooperates with {HEAD ~ a forwardly divergent conical surface} 26 provided on {TAIL ~ the upstream side} of the nut 18 
provided on
On its downstream side , each fly weight 22 has a sloping face 25 which cooperates with { HEAD ~ a forwardly divergent conical surface } 26 provided on { TAIL ~ the upstream side } of the nut 18
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH