(9) Transforming or converting apparatus: Power transformers, over 500 kilovolt amperes. ... (9) Transmission and distribution apparatus: Primary switchboards and panels, and parts, except oil circuit breakers, ... (9) Fuse plugs (plug fuses).
|Title||:||Comparison of commodity classifications shown during 1948 and 1949 in schedule B|
|Author||:||United States. Bureau of the Census|