FIELD: sportive equipment. SUBSTANCE: exerciser has pipe, isolators, pivot joint, adapter, valve, inhalation channel, casing, holder, tip adapted to be held in swimmer's mouth, pivot hinge, spherical member, closure, fastener, sealing members, exhalation channel, and gasket. EFFECT: increased efficiency and simplified construction. 2 cl, 3 dwg
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Authors
Dates
2000-04-27—Published
1998-10-22—Filed