. Process and manufacture according to EN737-1:1998, DIN13260-2, ISO9170-1, IS09170-2 standards, and obtain CE certification. 2. 100% airtightness test. 3. 10000 insertions and removals without any malfunctions. 4. Identify gases using the ISO32 color standard. 5. Use different socket shapes to distinguish different gases. 6. There are multiple installation methods, including an intake pipe with an outer diameter of 8, a gas pipe joint, or a threaded interface. 7. The types of gases include oxygen, suction, air, nitrogen, laughing gas, carbon dioxide, etc. 8. The terminal material is high-quality copper, and the sealing ring is made of imported materials. 9. Secondary plugging and unplugging to prevent accidental removal and ensure personal safety. 10. Installation methods: wall mounted, tower mounted, equipment belt mounted, etc. 11. Equipped with a detachable protective cover. 12. The German all metal series terminals also have the function of non dismantling equipment with the ability to repair gas terminals, while meeting the conditions of 1-11 mentioned above, and each gas socket has specificity for its base.