为了查清该地下灌排系统的存在及其构造，采用地球物理电磁法进行了探测。

In order to identify out the existence of the system and its structure, the geophysical electromagnetic technique is applied to detect and position the underground system.

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为了查清该地下灌排系统的存在及其构造，采用地球物理电磁法进行了探测。

It is introduced in this paper employing electromagnetic technique to detect and to locate leakage in cofferdams of a hydropower station construction recently.

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“十五”期间，我国大型灌区灌排系统工程改造取得了良好的经济效益、节水效益和减灾效益，成果十分显著。

During the Tenth Five-Year period, favorable economic benefits, water-saving benefits and disaster-mitigation effects have been acquired in large-sized irrigation and drainage project reform in China.

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“十五”期间，我国大型灌区灌排系统工程改造取得了良好的经济效益、节水效益和减灾效益，成果十分显著。

During the Tenth Five-Year period, favorable economic benefits, water-saving benefits and disaster-mitigation effects have been acquired in large-sized irrigation and drainage project reform in China.

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