Belarus standards PDF

Original standard PD 6446-1970 (2011) in PDF full version. Additional info + preview on request

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Original standard PD 6461-2-1980 (2003) in PDF full version. Additional info + preview on request

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Original standard PD 6461-4-2004 (2010) in PDF full version. Additional info + preview on request

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Original standard PD 6472-1974 in PDF full version. Additional info + preview on request

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Original standard PD 6474-1976 in PDF full version. Additional info + preview on request

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Original standard PD 6481-1977 in PDF full version. Additional info + preview on request

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