F waves result from the back fire of the motoneuron activation, which may indirectly reflect the functional state of the motoneurons.
波由运动神经元逆向兴奋引起，故有可能间接评价运动神经元的功能状态。
The log-period dipole array is applied as a feed element for a back-fire antenna.
用对数周期振子阵作为背射天线的馈源。
The log-period dipole array is applied as a feed element for a back-fire antenna.
用对数周期振子阵作为背射天线的馈源。
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