DIN 58425-4-1980 Gears with round flanks for fine mechanics tolerances and permissible devations for wheel and pignon《精密机械的圆齿面齿轮 第4部分 传动轮和小齿轮的公差和允许偏差》.pdf

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DIN EN 1176-5-2008 Playground equipment and surfacing - Part 5 Additional specific safety requirements and test methods for carousels English version of DIN EN .pdf

DIN EN 1159-1-2007 Advanced technical ceramics - Ceramic composites - Thermophysical properties - Part 1 Determination of thermal expansion (includes Corrigendu.pdf

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