7Wang. Y. J. Mining power consumption in multi -parallel fan networks by equalizing fan pressure [ J ]. Int. J. Rock Mech. Min. Sci. , 1983,20 (4) : 171 - 179.
8Jeming. G. E. Air curtain in the70's[J]. Refrigeration and Air Conditioning, 1970 ( 3 ) :93 - 99.