In the century after finishing the case of hardcover books, the manual work is reduced and the working procedure is shortened by flattening the books and pressing the groove.
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In the century after finishing the case of hardcover books, the manual work is reduced and the working procedure is shortened by flattening the books and pressing the groove (commonly known as pressing the line of fire or pressing the groove or pressing the spine of the book). The product has a high degree of finalization. Can be used with the shell machine, the effect is better.
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