5th-Gen Special Odor-Resistant Model: Specialized construction and demanding-grade membrane material reduce permeation or leakage by 99% for odor-free operation, making it ideal for projects particularly sensitive to odors. While utilizing ultra-low permeability materials, a fully sealed welding process, and an active protection system (strictly controlling inner membrane height and pressure) to achieve 99.9% airtightness, even flexible materials exhibit inherent permeability. Even trace permeation at the ppm level can, over time, cause sulfide-containing media to yellow the gas holder and produce a strong odor. This trace leakage creates a serious impression and violates national standards. Dabaiqiu's fifth-generation double-membrane gas holder technology utilizes a "blocking is worse than unblocking" strategy, developing a structured negative pressure odor isolation solution. This systematically captures trace permeation at the ppm level, ensuring a gas holder free of odor, yellowing, and leakage. Proven effective in multiple projects, it is now officially available.