According to the photo you sent this afternoon.We judge that the pinions of I-II and III-VI rotors are in good contact with the large gears and meet the assembly technical requirements of "contact marks are not less than 80% along the tooth width and not less than 55% along the tooth height.Please complete the follow-up work of air compressor assembly according to the relevant technical requirements; at the same time, send the installation and debugging records of bearings, gas seals and shaft seals to us to understand the specific situation.The specific test should be carried out in accordance with the manufacturer's operating instructions and our relevant mail.