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据不完全统计,建国以来已建成的大中型水电站引水发电隧洞约140条,全长120公里。最长的有压发电隧洞是四川渔子溪一级水电
According to incomplete statistics, about 140 hydropower tunnels have been built since the founding of the PRC, with a total length of 120 kilometers. The longest pressurized power tunnel is a Hydropower Station in Sichuan