STAS 7950 1-1988 KOTARY SHAFT LIP TYPE SEALS General technical requirements for quality《回转轴带挡边密封 一般质量技术要求 》.pdf

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STAS 7950 3-1983 Seals for machine building HOUSING FOR ROTARY SHAFT LIP TYPE SEALS 《机械制造密封 用于回转轴带挡边密封的遮盖物 》.pdf

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