Exact(4)
There are traces of four leaf-shaped fastenings, the catches on the lower board, the upper one cut in for fabric straps attached with star-headed nails.
In this book from the Paterno collection above (Antonio Mirabelli's Istituzioni de Eloquenza) you can see the traces of four separate handlers of the book: Aldo B., John Reynolds, Prof. F. Ettari, and finally the bookplate for the Paterno Library.
Fig. 4 Traces of four methods based in the on-grid model Fig. 5 Estimated azimuth as a function of time Fig. 6 Estimated elevation as a function of time Fig. 7 Azimuth error as a function of time Fig. 8 Estimated elevation error as a function of time.
Traces of four fused segments are evident in the three faint lines dividing each lobe of the tail fan.
Similar(4)
Traces of two partial lines on Frag.
Traces of five small round bosses on each board.
There are traces of two fastenings, the catches on the lower board, and traces of five round bosses on each board.
(a) Calcium traces of two neurons (blue and red) and identification of their calcium transient onsets.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com