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Standard
Mechanical systems and components for general use
Shafts and couplings
Shafts and couplings
21/21.120/21.120.01 Shafts and couplings in general
21/21.120/21.120.10 Shafts
21/21.120/21.120.20 Couplings
21/21.120/21.120.30 Keys and keyways, splines
21/21.120/21.120.40 Balancing and balancing machines
21/21.120/21.120.99 Other standards related to shafts and couplings
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