水平角测量原理 The Meterage of horizontal Angle Principle J6型光学经纬仪 J6 Optics Theodolite 水平角测量 The Meterage of Horizontal Angle 竖直角测量 The Meterage of Erect Angle 经纬仪的检验与校正 The Inspection and Emendation of Theodolite 经纬仪测角注意事项 The Notice of Measured Angle by Theodolite
水准测量原理 The Principle of Leveling 水准仪及其使用 The Water Level and the Usage 水准测量的一般方法和要求 The Common Methods and Demand of the Water Level 水准仪的检验和校正 The Inspection and Emendation of the Water Level 水准测量误差产生的原因及消减方法 The Causes and Elimination of Leveling