Richard Olsen

英 美
  • 奥尔森
    1. At the onset of the current outbreak Olsen was concerned.
      在当前的疫情开始时,奥尔森很担心。
    2. Olsen claims that roller-screw actuators provide up to 90 per cent efficiency.
      奥尔森称,滚子螺杆驱动器提供高达百分之九十的效率。