... etching agent 侵蚀剂 etching crack 腐蚀裂纹 etch-proof 防腐蚀的 ...
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Plenty of oxidation etching pits are found on the surface of the specimen after the thermal fatigue test, and the surface principal crack is prone to propagate through these etching pits.
实验结果发现，试样表面出现大量的氧化腐蚀坑，表面主裂纹优先通过这些腐蚀坑扩展。
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