格拉姆機
参考文献
- Thomspon, Sylvanus P. (1888), Dynamo-electric machinery: a manual for students of electrotechnics. London: E. & F.N. Spon. p. 140.
- Fink, Donald G. and H. Wayne Beaty (2007), Standard Handbook for Electrical Engineers, Fifteenth Edition. McGraw Hill. Section 8, page 5. ISBN 978-0-07-144146-9.
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