Standards
[CURRENT]
BS 978-2 Addendum No. 1
BS 978-2 Addendum No. 1
Gears for instruments and clockwork mechanisms. Cycloidal type gears. Double circular arc type gears
Title (German)
Zahnraeder fuer Instrumente und Uhrwerkmechanismen. Zykloidalzahnraeder. Doppelkreisbogenzahnraeder