CSN 22 6016-1989 Forming tools Blanking dies Geometry of functional holes《冲裁模 下料模 功能孔几何参数》.pdf

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CSN 22 6368-1989 Forming tools Blanking dies with inserts Technical requirements concerning design《冲裁模 下料模，带刀具 制造技术要求》.pdf

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