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  • [发明专利]JP19890229130 _ FUJI ELECTRIC CO LTD 1989年09月06日
    PURPOSE:To enable proper control of power generation by a method wherein the changing rate of a water-wheel output due to the opening degree of a deflector is operated based on the opening degree data of respective needle servos and the opening degree...
  • 2.
    [发明专利]JP19890229130 _ FUJI DENKI KK 1989年09月06日
  • 3.
    [发明专利]JP19890329503 _ TOSHIBA KK 1989年12月21日
  • [发明专利]JP19890329503 _ TOSHIBA CORP 1989年12月21日
    PURPOSE:To improve efficiency of hydraulic power station by providing a means for computing the volume of inflowing water taken in water tank of hydraulic power station and computing the volume of inflowing water to be distributed to each main machine...
  • [发明专利]JP19890290545 _ MITSUBISHI ELECTRIC CORP 1989年11月08日
    PURPOSE:To secure a better focusing property of an ion beam by constituting an ion extracting system of a screen grid, a plurality of accelerating grids and a plurality of decelerating grids, the ion extracting system extracting generated ions by mean...
  • [发明专利]JP19890087464 _ SUMITOMO ELECTRIC IND LTD 1989年04月06日
    PURPOSE:To disuse a peculiar switch in a device wherein arc discharge is performed upto discharge electrodes of negative and positive electrodes, and projectile is accelerated by means of a high pressure plasma generated thereby, by setting at least o...
  • [发明专利]SU19894633048 _ KIRGIZSKIJ NI OTDEL ENERGETIKI 1989年01月06日
  • [发明专利]SU19894721878 _ KAPANADZE IRAKLIJ G KAPANADZE MARSEL G 1989年07月20日
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