Modifications of present practice are suggested.
Motor-bicycle frame design
Automobile Engr
Automobile Engineer ; 11 , n 148
1921
4 pages
22 Figs.
Aufsatz (Zeitschrift)
Englisch
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BICYCLE FRAME TUBE HAVING BUILT-IN MOTOR, BICYCLE FRAME AND ELECTRIC BICYCLE
Europäisches Patentamt | 2020
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