通过对山顶、鞍部和山谷(山脊)不同地貌区域的试验，证实了该方法的有效性。

Finally, experiments about mountaintop, saddle and valley (or ridge) are carried out, which manifests the validity of the method.

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为此，研制成功了一种有线-无线信号中继设备，其特点是在复杂的地形、地貌区域施工时，译码器均能工作于无线状态。

To resolve this problem, a line radio signal exchanger has been developed, with which the decoder can always be operated in wireless mode. The design principle and…

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为此，研制成功了一种有线-无线信号中继设备，其特点是在复杂的地形、地貌区域施工时，译码器均能工作于无线状态。

To resolve this problem, a line radio signal exchanger has been developed, with which the decoder can always be operated in wireless mode. The design p…

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