| http://www.w3.org/ns/prov#value | - In a gear pump having a pair of bushings for the gears with abutting faces and a housing providing a seal ring carrying recess surrounding the bushings, the improvements of complementary recesses in the abutting faces of the bushings extending inwardly from the seal ring carrying recess, and a seal ring in said recess including a plug completely confined in said complementary recesses for sealing
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