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Từ điển WordNet v3.1 - WordNet Dictionary
Zimmer frame
a light enclosing framework (trade name Zimmer) with rubber castors or wheels and handles; helps invalids or the handicapped or the aged to walk • Syn: walker, Zimmer • Derivationally related forms: walk (for: walker) • Usage Domain: trade name, trade name (for: Zimmer) • Hypernyms: framework
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