在清理地下室时，约翰的头碰在横粱上。
While cleaning out the cellar, John bumped his head on a beam.
详细地分析了利用吉赫兹横电磁波室进行小体积受试设备（EUT）电磁场抗扰度测试的不确定度。
The uncertainty of electromagnetic field immunity test is particularly analyzed in this paper when it uses the GTEM for that small equipment under test(EUT).
根据非对称矩形同轴线原理研制了宽带吉赫横电磁波室。
A gigahertz TEM cell is developed according to the principle of asymmetric rectangular coaxial line.
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