Rod should not have obvious camber, crack, burr, peeling or other defect affecting he further USES.
杆料不应有明显弯曲，裂缝、毛刺、起皮及影响使用的其他缺陷。
Aemission spectrometer, micro-hardometer, optical microscope and scanning electron microscope were used to analyze the reason of crack on connecting rod unit assembly for piston of car engine.
采用直读光谱仪、显微硬度机、光学显微镜和扫描电子显微镜等分析手段，对失效的汽车发动机活塞连杆总成断裂原因进行了分析。
For the inner crack appearing often in round-rod rolling steels in the production, the influence to the crack from deformation extent and mechanical condition in the deformation region is discussed.
圆棒轧材在生产过程中经常出现内裂纹，本文研究了变形程度和变形区力学条件对内裂纹的影响。
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