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