Underground Ventilation: Proceedings of the 19th North American Mine Ventilation Symposium ((NAMVS 2023, 17-22 June 2023, Rapid City, South Dakota, USA)
... transition ducts are attached to each side of the fan with sound attenuators ... create disturbances to airflow and obstruct insertion of the tube . The ... Square - to - Round Transition Ductwork- Sound Attenuator Figure 1. Typical ...
Proceedings of the Second International Conference on Emerging Trends in Engineering (ICETE 2023)
... IEC 61000-1-4 IEC 61000-2-1, 61000-2-2, 61000-2-3, 61000-2-4, 61000-2-6, 61000-2-12 IEC 61000-3-2, 61000-3-4, 61000 ... 30, 61000-4-31 which leads to a BAC shutdown mode and disables the power electronic device. To counteract BAC ...
Mine Ventilation: Proceedings of the 18th North American Mine Ventilation Symposium, 12-17 June, 2021, Rapid City, South Dakota, USA
... other dust in this location, up to 31%. SEMEDX analysis of respirable dust in other mines, particularly thin-seam mines, has also yield inordinately high percentages of AS (or AS+S) particles dust near the mine face (Sarver et al. 2019 ...
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