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		航空齿轮钢16Cr3NiWMoVNbE的真空低压渗碳
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			Vacuum Low-pressure Carburization of Gear Steel 16Cr3NiWMoVNbE for Aviation
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| 图8. 从渗层到基体的元素变化 | 
| Fig.8. Elemental changes from surface to substrate (a) linear scanning direction (b) elemental spectrum | 
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