1. We own multifarious patent structure and advanced technology at abroad and domestic:
①According to the feeding method, feed structure could be divided into the involute feeding, the volute pre-classifying feeding,
spiral feeding etc.
②According to cone structure, it could be divided into flat bottom structure, multi-cone structure, the cone angle gradient
structure, etc.
③According to the overflow way, it could be divided into the air conditioning and energy saving overflow cap, thick wall overflow
pipe and other design.