| DRAFT DICTIONARY CBF/imgCIF Extensions Dictionary | Draft version 1.5 for comment | 
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Definition:
        The radial distance from one 'cylinder' of pixels to the
               next in millimetres.  If the scan is a 'constant velocity'
               scan with differing angular displacements between pixels,
               the value of this item may differ significantly from the
               value of _array_structure_list_axis.displacement_increment.
Type: float
Mandatory item: no
Category: array_structure_list_axis
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