1，Used for naval fleet clothing packaging and garbage packaging, 3502 factory is a military uniform production enterprise, and the company purchased multiple batches of vacuum compression bags for a certain fleet of the South China Sea Fleet and a certain submarine unit.

2，The frontier defense forces in the western theater faced off in the high cold, supplying a batch of vacuum compression bags to the theater to airlift to the station, providing clothing and moisture protection for the high-cold frontier defense patrol garrison.