However, the zig-zag and discontinuous microscopic growth path of fatigue cracks with some branching cracks expanded locally was observed.
但从微观上看，裂纹的微观扩展路径曲折、不连续，常伴有分枝裂纹的形成。
However, the zig-zag and discontinuous microscopic growth path of fatigue cracks with some branching cracks expanded locally was observed.
但从微观上看，裂纹的微观扩展路径曲折、不连续，常伴有分枝裂纹的形成。
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