fracture surface observation
fracture surface observation
断裂面观察
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The fracture mode and cause were analyzed and determined by fracture surface observation, metallurgical structure examination, chemical analysis and hardness testing.
通过断口宏微观观察、金相组织检查、化学成分及硬度检测等手段确定了叶片断裂性质和原因。
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