Object of {HEAD ~ the present invention} is to provide an apparatus for the metrological checking of crankpins rotating with an orbital motion, in {TAIL ~ the course} of a grinding operation, or in a similar one, that can provide good metrological performance, high reliability and small forces of inertia 
Object of { HEAD ~ the present invention } is to provide an apparatus for the metrological checking of crankpins rotating with an orbital motion , in { TAIL ~ the course } of a grinding operation , or in a similar one , that can provide good metrological performance , high reliability and small forces of inertia
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