Many flange for rotating: circular flange and squareflange.
多种法兰可供选转：圆型法兰和方型法兰；
2
Squareflange heaters (boiler heaters) are suitable for constrained areas, square and round flanges are made of compact elements that are easily installed by tightening a series of bolts.
锅炉加热器适合用于限制区，方形和由小型加热元件制成的圆形法兰。
3
This paper proposes an online detection system of flange based on Least Square Collocation (LSC).