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Emphasis is placed on a practical HPM radiating antenna fed by beam waveguide.

该天线工作在X波段时，功率容量大于1 GW，天线增益大于50 dB。

If two FM signals are on the same frequency at the same time, there will still be a heterodyne or beat note (unless one is 6 dB stronger than the other).

如果2个调频信号同时出现在同一频点上，仍然会导致&撞车&，除非有一个信号的强度高于另一个6dB，以上。

If two FM signals are on the same frequency at thesame time, there will still be a heterodyne or beat note (unless one is 6 dB stronger than the other).

如果2个调频信号同时出现在同一频点上，仍然会导致&撞车&，除非有一个信号的强度高于另一个6dB，以上。

After sustained exposure of 2h to 90 dB the total time of black-red digit test was prolonged and the time performance decreased, the reaction time of attention range also was prolonged.

但90dB、2h的持续暴露，可引起黑红数字测试的总时间延长，时间绩效降低，注意广度测试的反应时延长。

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Cooking and other gas appliance combustion burner of the noise should be less than 65 dB.

它在燃烧系统安装有多用点火嘴与多用燃烧火嘴。

It was found that the woodceramics underwent chemistry structure transformation contrary to uncarbonized wood powder during carbonization process on the basis of FTIR analysis, and the aroma structure in the woodceramics was increased.

木质材料和酚醛树脂的质量比为50：50时，在9KHz～1500MHz范围内，木陶瓷具有中等屏蔽效果(40～50)dB，可以用作高温环境下电气设备的电磁屏蔽材料。

A condenser microphone can have a 10 to 15 dB higher output level over a dynamic microphone.

电容传声器能够比动圈传声器多获得10-15dB的输出电平。

Sound insulation: Hollow glass filled with inert gas reduces 30 db of noise, and hollow glass can drop from 80db to 45db.

隔音： 一般中空玻璃降低噪音30分贝，充有惰性气体的中空玻璃可将80分贝的噪音降至45分贝极为安静的程度。

The results showed that the main frequencies were at about 6～100Hz and the sound pressure levels were about 80 dB.Infrasonic sound existed notwithstanding the dust remover was at work or not.

结果显示声音的主频在6～100Hz左右，为次声和低频噪声共存，工作场所声压级在80dB左右。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。