Through constantly exploring and improving, our factory has successfully developed the technolo-gy of applying vaccum precision casting in heavy steel-castings which has past the field experts' appraisement, obtained the first class award of Zhanjiang Science & Technology Progress, and become the first enterprise applying this technology in Canton province. The accessory of sugar refining machine, sprocket, three-star tooth, pressing roller casted .the heaviest weight of single piece can reach 12t, with this technology have characteristics as good quality in appearance, little machining-al Iowa nee, high performance and low loss, these productions are welcomed by users.