from 2021/09

ConcatPDF

via https://freesoft-100.com/review/concatpdf.php

ConcatPDF https://kazuyaujihara.github.io/ConcatPDF/ConcatPDF-Helpen.html

GitHub - kazuyaujihara/ConcatPDF: PDF concatenation tool https://github.com/kazuyaujihara/ConcatPDF

ConcatPDFの詳細情報 : Vector ソフトを探す！ https://www.vector.co.jp/soft/dl/winnt/writing/se314678.html