reverse-frequency

Based on the well structure size and the drilling parameters, the characteristic of drill pipe reverse rotation, the calculating formula of the reverse rotation speed and its bending frequency was analyzed in detail.

根据塔里木油田井身结构尺寸、钻井参数，详细地分析了塔里木油田钻杆反转转速、弯曲频率和其环隙比与反转运动的关系。

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Then at the 6 point will lead to a higher pregnancy rate. The reverse mutation frequency of the protoplast of the auxotrophic mutants was less than 10 ￣(-6).

营养缺陷型菌株原生质体回复突变率小于10￣（－6）。

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Aiming at compensating the absorption and attenuation of seismic signal, the paper anew establishes the relationship about absorption coefficient and Q-value, and brings forward a time window method that is base on reverse Q-value to compensate strata absorption and attenuation in frequency domain.

针对地震信号的吸收衰减补偿问题，在重新建立吸收系数和Q值关系的基础上，提出了一种基于反Q补偿的分时窗频域吸收衰减补偿方法。

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This article puts forward the concept of Chinese and English dictionary with reverse term frequency.

提出了带反向词频的中英文词典这一概念。

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According to the test result of frequency response characteristic of the excitation system without PSS the parameters of the PSS are set and both step response test of the load and mis-reverse adjustment test for the excitation system after the setting are carried out.

根据无PSS时的励磁系统频率响应特性试验结果对PSS的参数进行了整定，并对整定后的系统进行了负载阶跃和反调试验。

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For this reason, special inductor and fixture have been designed and the heat treatment problem of the reverse fork has been successfully solved by double high frequency quenching.

为此，设计制造了特殊的感应器和工装夹具，采用二次高频淬火工艺解决了该倒挡拨叉的热处理难题。

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