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| Bicycle 1977-1981 |
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| Bicycle beam frame and plastic perforated wheel 1980 |
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| Bicycle beam frame and plastic spoked wheels 1980 |
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| Bicycle beam frame and plastic spoked wheels 1980 |
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| Bicycle beam frame and plastic wheels 1980 |
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| Bicycle beam frame and solid plastic disc wheels 1980 |
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| Bicycle beam frame drawing 1977-1981 Drawing by my late colleague Lou Nijhuis (1948-2014) |
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| Bicycle double tube frame 1980 |
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| Bicycle plastic spoked wheels 1980 |
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| Bicycle wheel alloy rim, plastic spokes 1980 |
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