Back up roller: roller which backs up the impression roller FOR additional pressure in gravure printing.

加压辘：在照相凹版印刷机上，给予压力圆筒额外压力的辊辘。

youdao

Back up roller: roller which backs up the impression roller FOR additional pressure in gravure printing.

加压辘：在照相凹版印刷机上，给予压力圆筒额外压力的辊辘。

youdao