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1·The influencing factors of coal arch camber in planomural coal bin and coal drop pipe with rectangular or circular cross section during coal drop are studied theoretically.

对落煤过程中平壁煤仓及截面形状分别为矩形、圆形的落煤管起拱的影响因素进行理论研究。

2·From the causes of not smooth arch, the structure of the material, this paper talks about several aspects of the structure camber control.

文章主要从拱度的成因、结构的材料等几个方面来谈谈对结构拱度的控制。

3·Influence of different camber Angle on special-shaped spatial combination arch-rib arch mechanical behavior is analyzed under completion state.

在成桥状态下，分析了不同外倾角对异形空间组合拱肋拱受力性能的影响。