The fatigue crack propagation rate (FCPR) of as-rolled AM60 in the longitudinal direction is higher than that of the transverse direction.

轧制AM60的横向疲劳裂纹扩展速度（FCPR）明显地高于纵向。

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Target frequency domain response is sampled with only a few FCPR sub-pulses, from which target high resolution range information is reconstructed exactly.

该方法采用少量FCPR信号子脉冲对目标频域响应进行采样，即可提取目标高分辨距离像信息。

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