| 摘要 |
This apparatus comprises a support 1 which includes a mobile feeler 38, and a plate 22 which is mounted rotationally and can be indexed on the said support and includes means 29, 32 for fastening a spectacle frame in contact with the said feeler 38, and means 13, 16 for indicating the displacements of the latter as a function of the indexing of the plate 22. <IMAGE>
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