The shaft also shall have a directional indicator on top to indicate disc position when the handle is removed.
阀杆也应该在顶部配置方向指示器，用于当手柄拆卸下来时指示阀瓣的位置。
2
Overload, over-temperature, or shaft jam conditions stop the motor and are signaled by a display indicator and audible alarm.
过载、超温或轴卡滞情况发生会停止电极的工作并且会由显示指示器和声响警告器给出信号。
3
The main engine brake horse power to be calculated by main shaft revolutions, load indicator notch, properties of fuel oil etc., in accordance with manufacturer's recommendations.