This paper discusses the question of crane main girder camber and the pre-cambering curve, introducing camber values stipulated in related crane standards in China and abroad.
本文论述起重机主梁的上拱度及预拱曲线的基本原理，介绍了国内外起重机技术标准中规定的上拱度值。
The continuous casting curve of the arc continuous caster is illustrated, the continuous casting curve equation is also provided based on the curve camber.
从曲率出发，阐述了弧形连铸机的连铸曲线，建立连铸曲线方程；
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