It's very convenient to observe, operate the pressure, thickness, feeding, speed adjustable hand wheels and all kinds of buttons, indicating lights and indicators are at the same side.

压力、片厚、充填、速度调节手轮，各类指示灯、表牌、按钮均设在同一方向，观察、操作方便。

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A bullhorn sounds indicating timeouts. But because the players are deaf, backboard-mounted lights also flash to insure the players knew what was going on.

VOA: standard.2009.09.10

The arrangement of benchboard switches and indicating lights is a setup for the indicators to be obscured by lockout tags.

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At first, the rats scratched at their faces, indicating that they were interpreting the lights as touch.

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