《水利工程测量》精品课程 ●●●●● ●●●● ●●0 ●●● ●●●● m水平角测量原理 The Meterage of horizontal Angle Principle mJ型光学经纬仪 J6 Optics Theodolite m水平角测量 The Meterage of Horizontal Angle m竖直角测量 The Meterage of Erect Angle n经纬仪的检验与校正 The Inspection and Emendation of Theodolite m经纬仪测角注意事项 The Notice of Measured Angle by Theodolite 场士子 XI'An University of Technology 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