NF F19-809-1-2012 Railway rolling stock - Extreme pressure oils for mechanical transmissions of tractive units - Part 1 moderate thermal stability oils 《铁路车辆 - 牵引装置机械传输用极压油 - 第1部分.pdf

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NF F19-809-1-2012 Railway rolling stock - Extreme pressure oils for mechanical transmissions of tractive units - Part 1  moderate thermal stability oils 《铁路车辆 - 牵引装置机械传输用极压油 - 第1部分.pdf_第1页
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