It has been experimented at 1325 fully me cha nized working face in Gequan Coal Mine, Xingtai, and an average dust preventing efficiency of about 72%was obtained.

• 在邢台矿务局葛泉煤矿1326综采工作面进行的现场试验表明：该装置对呼吸性粉尘有较好的隔尘效果，平均隔尘效率为72%25以上。