The washer 13 consists of a disklike flat portion 16 for pressing and fixing a piece of covering material in place, and a plurality of {HEAD ~ leaf spring} like projections 15 extending radially inwardly of the flat portion, with {TAIL ~ a gradual descent} to a given length, until they terminate convergently 
The washer 13 consists of a disklike flat portion 16 for pressing and fixing a piece of covering material in place , and a plurality of { HEAD ~ leaf spring } like projections 15 extending radially inwardly of the flat portion , with { TAIL ~ a gradual descent } to a given length , until they terminate convergently
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 HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH