https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13960855
A large sheet is hanging over a series of rods suspended over a large steaming vat, one man turns a handle and others are using long sticks. Engraving.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use