Breakpoint repair method of high-pressure inflatable sealing shroud in high-speed wind tunnel: the ventilation skeleton is inserted into the breakpoint, and both ends of the shroud are bundled on the ventilation skeleton, and then repaired by applying sealant.

Almost all of the air circulating in the aircraft comes from the aircraft air conditioning system, which is a major part of the aircraft cabin environmental control system. The cabin environmental control system provides the following three functions: cabin pressurization, temperature regulation, and equipment cooling.

Aircraft ground air conditioning (hereinafter referred to as PCA) is an air conditioning unit that provides fresh air suitable for temperature and humidity environment and physiological needs for passengers and crew members parked on the boarding bridge at the airport, which provides a comfortable environment during ground maintenance.