介绍了用经纬仪进行光学三角测量对立式圆筒形储罐进行校准的方法。该方法可替代其他方法，如捆扎法（MPMS第2.2A章）和光学参考线法（MPMS第2.2B章）。本版第2.2C章是ISO 7507-3:1993的国家采用版本。

Describes the calibration of vertical cylindrical tanks by means of optical triangulation using theodolites. The method is an alternative to other methods such as strapping (MPMS Chapter 2.2A) and th eoptical-reference-line method (MPMS Chapter 2.2B). This edition of Chapter 2.2C is the National Adoption of ISO 7507-3:1993.