φ650 mm 70Cr3Mo钢支承辊的一种低成本最终热处理工艺参数的制订
φ650 mm 70Cr3Mo강지승곤적일충저성본최종열처리공예삼수적제정
The Formulation of a Low-cost Last Heat Treatment Process Parameters of 70Cr3Mo Steel Used for φ650mm Back-up Roll
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