dam periodical inspection
dam periodical inspection
大坝定期检查
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Maojianshan hydropower station has operated for 40 years safely. Two times of periodical inspection has been carried out, and the dam has assessed as normal one.
毛尖山水电站已安全运行了40年，进行了两次大坝安全定期检查工作，大坝被评定为正常坝。
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