Aluminum alloy medical cylinders feature lightweight, smooth and clean inner surface, corrosion resistance etc. To compare with the steel cylinder in the current market, aluminum alloy medical cylinder is up to 30 percent lighter, no rust for long time using, no peculiar smell while oxygen inhalation, so that to ensure the medical oxygen quality. Centralized Oxygen Supply Equipped with single or double 10L aluminum cylinders, gas pipeline, rapidly pluggable terminal and respirator in ambulance. The advantages are long time gas supply, no open wire and beauty in ambulance. Vehicle-mounted Equipped with single 4L aluminum cylinder or single/double 10L aluminum cylinders, valve, respirator, fixed support and base, etc. The advantages are easy installation, lower cost than centralized oxygen supply. Portable