The detector is housed in a 12 million gallon tank of water surrounded by 11,000 light sensors, at the bottom of an abandoned mine 3300 feet underground.
该探测器设在一个3300英尺深的地下废弃矿井的底部，主体是一个1200万加仑容积的水箱，周边安置有11000个光传感器。
The optimal application of sound pole, leak detector and correlator supported by leak detection program have improved the accuracy of leak detection of underground water pipelines.
听音杆、检漏仪和相关仪等设备的优化使用，加之合理的检漏程序，提高了地下输水管道漏点检测准确率。
An ultrasonic detector for wall rock crack is introduced which is able to detect coal mine underground wall rock looseness range and cracks.
介绍了一种超声波围岩裂隙探测仪，可用于探测煤矿井下围岩松动范围及裂隙情况。
An ultrasonic detector for wall rock crack is introduced which is able to detect coal mine underground wall rock looseness range and cracks.
介绍了一种超声波围岩裂隙探测仪，可用于探测煤矿井下围岩松动范围及裂隙情况。
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