Battery clamping mechanism

作者: Otto C Niederer

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参考文章(6)
La Verne F Ferguson, Battery case for automobiles ,(1938)
Stanley I Bey, Method of making a template ,(1953)
Arnold B Freeman, Roland A Tripp, Bernard D Raffel, Method of making a dome-like body of plastic reinforced fibers ,(1956)
Charles B. Franklin, Battery box or container ,(1926)