The installation of the miter gate for Three Gorges Permanent Lock has the characteristics of big construction difficulty, high installation accuracy requirements and many assembly parts.
三峡永久船闸人字门安装具有施工技术难度大、总装精度要求高、安装部件多而杂等特点。
Using traditional plumb lines in elevator guide rails' installation is difficult to ensure the installation accuracy, wasting time and Labour.
电梯导轨安装精度以往多采用吊线锤法，一般很难保证导轨的安装精度，且费时、费力。
The invention has the beneficial effects of low construction risk, high efficiency, short construction period, high installation accuracy and low installation cost.
本发明的有益效果是：施工危险低、效率高、工期短、安装精度高、安装成本低。
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