Noise pollution in fully mechanized mining workfaces threatens the occupational health and safety of miners. Obstacles such as mechanical equipment and pipelines in roadways can alter noise ...
The development of high-power, broadband sources of coherent mid-infrared radiation is currently the subject of intense research that is driven by a substantial number of existing and continuously ...
A multi-frequency HDD transmitter gives the crew more options when signal conditions change. It does not make the locating ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results