1.1 This specification covers normalized and tempered, and quenched and tempered carbon and alloy steel forged or rolled rings for reduction gears.

1.2 Several classes of steel are covered as follows:

1.2.1 Classes A, B, C, and D are carbon steel.

1.2.2 Classes E, F, G, H,...

1.1 This specification covers normalized and tempered carbon steel and quenched and tempered alloy steel forgings for pinions, gears, and shafts.

1.2 Several classes of steel are covered as follows:

1.2.1 Class 1 is normalized and tempered carbon steel.

1.2.2 Classes 2 to ...

An user-oriented computer software consisting of three modeling codes, named DRAD, DRAA and FDPAT, is introduced. It can be used to design three types of Cassegrain system: classical, with shaped subreflector and with dual shaped reflectors, and to analyse radiation patterns for the antennas. Severa...

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