Parallelism and track angle checking device used on wheels of two-wheeled vehicle, has firmly installed rear measuring unit with optical device emitting light representing plane of running wheel
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Pedal crank checking device for bicycle, has optical device that receives light beam from measurement spot and provides measurement result on indicator
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Bicycle fitting for V-shaped security lock - has clip fitting onto side supports for rear luggage carrier
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Process and device for cultivating different mammal cells at the same time
