Overview: When this series of quick connector for the current popularity of the domestic advanced welding torch, cutting torch and other equipment, the actual use due to a variety of gas pipeline more difficult to distinguish easily lead to misuse, as well as the original joint in the trachea drag: Overview easy to loose and other issues and developed a new generation of national patent products. It has a close high dexterity convenient, safe and reliable, long life and other advantages, is currently the combustible gas line used for welding, cutting and other devices connected to the most ideal quick connector.