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Title: Automatic Chart Changers
Author: Richard L. Howard
Source: 1977 International School of Hydrocarbon Measurement
Year Published: 1977
Abstract: Automatic chart changers have been a v a i l a b l e to u s e r s of circular charts since 1958. The first commercial installations of the Dial-O-Graph automatic chart changers recorded occurred in early 1959. To d a t e , there have been over 2 3, 000, of this brand manufactured. Some t r a n s mission companies have purchased well over 2 , 0 0 0 , automatic chart c h a n g e r s.




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