Ensure that the leader is responsible for supervising the safety of machinery and equipment and crew operators. Before the operation, the operator must wear work clothes, work hats, and work shoes neatly, fasten the placket and cuffs, do not put debris in the pockets, and do not wear watches and various accessories. Before starting the machine, add the required lubricating oil to each oil filling point, lubrication point and oil tank of the machine. Without approval, non-crew members are not allowed to start and operate the machine, and assistants and apprentices should work under the guidance of the pilot. Before starting the machine, check whether there are sundries in various parts of the fuselage. You must first give a signal (press the safety bell), echo back and forth, and make sure the surrounding area of the machine is safe. Before the machine is running, count backward for a few weeks, and then count for a few weeks, so as to avoid debris between the rollers and damage the blanket and printing plate. Operation is prohibited by non-staff.