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n4freepatentsonline.
Subject Item
isa:42909568
rdf:type
prov:Entity
prov:value
A stopper washer 52, 1 of graphite or other suitable material, is carried at the lower end of the stopper plunger within the cavity 32 and adapted to seat against the inner opening of the ingate 24.
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n4:com
Subject Item
isap:58445154
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isa:42909568