Aircraft ground support equipment - General requirements - Part 4: noise measurement methods and reduction.

飞行器地面支持设备。一般要求。第4部分：噪声测量方法和噪声降低。

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Aircraft ground support equipment - General requirements - Part 4: noise measurement methods and reduction.

飞行器地面支持设备。一般要求。第4部分：噪声测量方法和噪声降低。

youdao