Moldova standards PDF

Original standard ISO R 42-1957 in PDF full version. Additional info + preview on request

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Original standard ISO R 421-1965 in PDF full version. Additional info + preview on request

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Original standard ISO R 440-1969 in PDF full version. Additional info + preview on request

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Original standard ISO R 443-1965 in PDF full version. Additional info + preview on request

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Original standard ISO R 453-1965 in PDF full version. Additional info + preview on request

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Original standard ISO R 455-1965 in PDF full version. Additional info + preview on request

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