Russian standards PDF
Unified system for design documentation. Instructions for marking and stamping articles
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Unified system for design documentation. Rules for making working drawings of spur gears of Novikov's transmissions with two engagement lines
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Unified system for design documentation. Rules for making working drawings of gear chain sprockets
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Unified system for design documentation. Rules for making working drawings of dismountable chain sprockets
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Unified system for design documentation. Rules for making working drawings of sprockets for round-link chain wheels
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