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350m的SC沉降仪和ZP引张钢钢丝式水平位移计是目前世界上埋设管路最长的垂直水平位移计，已在天生桥一级水电站大坝坝体填筑中安装成功，并经调试后观测出初始值。根据仪器测试，其重复测读误差均不超过3mm，远远高于设计精度。天生桥一级水电站大坝是当今世界上在建的高混凝土
350m SC settlement instrument and ZP tensile steel wire horizontal displacement meter is the longest vertical displacement displacement meter buried in the world and has been successfully installed in the dam body of Tianshengqiao-1 Hydropower Station. After commissioning Observed the initial value. According to the instrument test, the repeated reading error is not more than 3mm, much higher than the design accuracy. Tianshengqiao a hydropower dam is in the world today under construction of high concrete