TY - Journal of Yangtze River Scientific Research Institute A1 - LI Jin T1 - Technology of Variable Frequency Speed Regulation Applied in Fan or Pump Load Y1 - 2015-09-20 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 157 EP - 160 VL - 32 IS - 9 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20140107 ER -