Offset printing machine

This kind of offset printing machine has two paper sizes, one is 470*365mm and another is 560*400mm. 1. SIZE 470mm: There are five models. 47/47A/47NP/47ANP/47BNP 2. SIZE 560mm: There are three models: 56/56NP/56BNP In the above models: only the model 47 has two ink form rollers, all the others have three ink form rollers PS: About the meanings of the relevant letters in these models "A" means single color "B" means double color "NP" means numbering function