TY - BOOK A1 - TI - Developments in variable speed drives for fluid machinery: conference sponsored by the power Industries Division of the Institution of Mechanical Engineers and the Institution of Electrical Engineers, 9 June 1981, Institution Headquarters, 1 Birdcage Walk, Westminster, London PB - كتابخانه مركزی و مركز اسناد دانشگاه صنعتی خواجه نصير الدين طوسى SN - 92026863 UR /book/92026863/Developments-in-variable-speed-drives-for-fluid-ma/ ER -