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GB/T 11357-2020 Quality, roughness and balance of transmission pulleys 带轮的材质、表面粗糙度及平衡 - 中英文版 |
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GB/T 11357-2008 Quality, roughness and balance of transmission pulleys 带轮的材质、表面粗糙度及平衡 - 中英文版 |
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