In the Three Gorges Project of the Yangze River, the bellow used in pressure pipes of the drawing section water was the largest size one which was designed and made in our country to this day.

• 长江三峡水利枢纽工程中 ,引水压力管道伸缩节用的波纹管是迄今为止国内自行设计、制造的最大尺寸波纹管。