本图所采用地形图是由华东院提供1：2000、6度带地方坐标高程系地形图。
Relief map employed by the drawing is1:20006degrees elevation relief map with local coordinates and provided by hydrochina. huadong engineering corporation.
导出了重力、高程变化及相互关系在球坐标系中的理论和数值计算公式。
The theoretical and numerical formulas for gravity and height variations in spherical polar coordinates are derived.
掺加不同种类的缓凝剂均不同程度促进高效减水剂提高减水作用，并且对减水作用的提高程度反映了该缓凝剂与萘系高效减水剂和水泥三者的适应性差别。
By adding different retarders, the water reducing effect is improved in varied degrees, which reflects the difference of its adaptability to naphthalene water-reducing agent and cement.
掺加不同种类的缓凝剂均不同程度促进高效减水剂提高减水作用，并且对减水作用的提高程度反映了该缓凝剂与萘系高效减水剂和水泥三者的适应性差别。
By adding different retarders, the water reducing effect is improved in varied degrees, which reflects the difference of its adaptability to naphthalene water-reducing agent and cement.
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