According to your 21/4-20 pm photo.We judge that the small gears of the I-II and III-VI rotors are in good contact with the large gears, in line with the assembly technical requirements of "contact spot snout of not less than 80% of the tooth width and not less than 55% of the tooth height".Please complete the follow-up work of air compressor assembly according to the relevant technical requirements, and send us the installation and commissioning records of bearings, air seals and shaft seals in order to understand the specific situation.Specific tests should be carried out in accordance with the operating instructions of the production plant and our related mail.