所以不需要高的准确度，测试设备也不需要很精细。
Therefore, high accuracy is unnecessary and the test equipment need not be elaborate.
为了保证强噪音环境下测试的准确度，系统还带有一只耳机。
To aid detection of bleed valve movement in noisy environments a headset has been provided.
为了保证强噪音环境下测试的准确度，系统还带有一只耳机。
To aid detection of bleed valve movement in noisy environments a headset has been provided.
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