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 pipe for welding, cutting and other devices connected to the most ideal quick connector.