One-way wrench

1. Field of Invention A wrench includes a head, a gear, an engagement element and a bent spring. The head defines a circular space and a crescent space communicated with the circular space. The gear includes a plurality of teeth and is received in the circular space. The engagement element includes...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: Hsu, Yung-Chung
Format: Patent
Sprache:eng
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