前言：简述了“九龙鼎”的制作过程，详细介绍了用熔模石膏型铸造大型鼎身的工艺及要点。
This paper introduces the process of making "nine dragon" tripod vessel and describes the technology and key for casting the body by lost wax pattern plaster mold process in detail.
河南龙鼎铸业股份有限公司供应的刹车鼓为迪砂线生产，冲天炉和电炉双联熔炼的机械造型铸件，材质为HT250。
The brake drum supplied by He Nan Longding Casting Industry Co. , Ltd is made by DISAline, double-smelting and mechanical sculpting.
河南龙鼎铸业股份有限公司供应的刹车鼓为迪砂线生产，冲天炉和电炉双联熔炼的机械造型铸件，材质为HT250。
The brake drum supplied by He Nan Longding Casting Industry Co. , Ltd is made by DISAline, double-smelting and mechanical sculpting.
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