This is an LNG air tank fully automated polishing machine. Polishing process: After the first polishing wheel passes through the fourth one in order, the required finish can be achieved Ra0.8.4. The working cycle is about 15 minutes. This equipment is suitable for mass production. The equipment is equipped with a fully enclosed enclosure, which can be opened with a transparent glass viewing window. With dust suction device, according to the actual situation of the workshop, the fan is equipped with connection.