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→ 21 MECHANICAL SYSTEMS AND GENERAL PURPOSE DEVICES
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21 MECHANICAL SYSTEMS AND GENERAL PURPOSE DEVICES
21.020 Characterization and design of mechanisms, instruments and equipment
21.040 Screw threads
21.080 Hinges, eyelets and other joints
21.120 Shafts and couplings
21.140 Seals, oil seals
21.180 Enclosures, cases and other machine parts
21.220 Flexible drives and transmissions
21.240 Rotational-translational mechanisms and their details
21.260 Lubrication Systems
All Codes and Regulations
National Standards for KGS (State Standards Classification)
Projects of works (PPR) on bridges
Construction Price Formation
Evidence base (TR CU, Technical Regulation of the Customs Union)
Standards for pipe fittings (TPA)
News and Press
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