The practical testing indicates that the system has an evident electricity-saving effect while ensuring a safe underground operation.
实际测试表明，在给井下安全作业带来了可靠保证的同时，节电效果明显。
The practical testing indicates that the system has an evident electricity-saving effect while ensuring a safe underground operation.
实际测试表明，在给井下安全作业带来了可靠保证的同时，节电效果明显。
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