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ICS
21
21.120
Shafts and couplings
ICS
Field
21.120.01
Shafts and couplings in general
21.120.10
Shafts
21.120.20
Couplings
21.120.30
Keys and keyways, splines
21.120.40
Balancing and balancing machines
21.120.99
Other standards related to shafts and couplings