The concave flange and the convexflange are provided with central pylomes for the conveying pipes to extend into; the concave flange is connected with the convexflange by the binding bolts.
凹形法兰和凸形法兰均设有供输送管伸入的中心通孔，凹形法兰和凸形法兰之间通过紧固螺栓联接。
2
A flange is arranged under the reaction tube and provided with a positioning convex block.