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本文介绍了降低呼吸性粉尘的∏形风水喷雾装置及其应用情况。该装置能显著降低炮掘工作面的高浓度粉尘，特别是能有效降低呼吸性粉尘。
This article describes the Π-shaped feng shui spray device and its application to reduce respiratory dust. The device can significantly reduce the high concentration of dust digging face, especially to reduce respiratory dust.