hard steel

Supercalender: A calendering stack with alternate hard steel rollers and soft rollers, some of which move faster than others, which imparts a high gloss finish to paper as it "slips" between them.

是一座直立的锟和软辊组，它们交替排列，一些锟转动较其他辊快，造辊与辊之间的滑动，因而把纸磨得十分光滑。