Based on the theory of solid geometry, a survey method to measure the bucket foundation installation error and ensure the installation precision is presented. 提出了根據空間立體幾何原理對桶形基礎平台進行桶基安裝誤差測量並保證安裝精度的方法。
Formula is used to explain the factors affecting the measurement precision of score errors of the circular raster by photoelectric phase-comparing method for angle positioning. 摘要用公式推導說明了影響光電定角比相法檢測圓光柵刻劃誤差測量精度的因素，並用兩台測量精度不同的儀器做了實驗驗證。
