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What is Surface Finish Tolerances Explained about?
The document discusses symbols and parameters to indicate surface roughness in technical drawings. It explains that triangles used to indicate roughness are outdated and recommends using specific parameters such as Ra. Table 6.4 relates the old triangle symbolism with Ra values for different levels of surface quality requirements. Table 6.5 provides approximate conversions between roughness measurement scales such as Ra, Rq, Ry, and Rz.
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- ScribdTranslations
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- EN