Wet compressed air is damaging to tools, instruments, controls and machinery.

湿式压缩空气正在毁坏工具，仪器，控制器和机械。

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Metheny says he worked with inventors and technicians from around the country to build the robotic instruments used on Orchestrion. He programs and controls every sound from his computer, guitar or keyboard.

VOA: special.2010.03.12

The White House still controls the most important instruments of power: the government apparatus, the attention of the press corps and the capacity to set the agenda.

ECONOMIST: Lexington

For the more sophisticated the instruments investors have at their disposal, the less likely controls are to work.

ECONOMIST: Time to turn off the tap?