1. This stirrer is a new type of axial flow stirrer that can be used for the suspension mixing of liquid-liquid or liquid-solid two-phase. The arbitrary cross-section of the blades of this stirrer consists of a segment of arc and two warped straight edge segments at both ends, and the outer edges of the two straight edge segments form a wavy curve composed of several semi-circular arcs. The blade extends from the end to the root along the middle of the blade...