"印刷工艺学" can be translated into English as "Printing Technology" or "Printing Engineering".
"Printing Technology" emphasizes the technical aspects and methods involved in the printing process.
"Printing Engineering" focuses more on the engineering principles and applications in the printing field.
Both translations are acceptable, and the choice between them may depend on the specific context or emphasis of the discussion. In academic or professional settings, "Printing Technology" is often used to describe the study and practice of printing processes.