Correct use of puffing equipment ⑴ The box bearings should be filled with lubricating grease in time, and the lubricating grease should be replaced once after 500 hours of operation. (Appropriate grease should be added before the new machine is operated, and the oil should be changed after 200 hours of operation.) ⑵ Other bearing parts should be filled with grease regularly. ⑶ It is...