898 resultados para PD control


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Vol. 1. Hearings, January 3 to February 21, 1919.- -v. 2. Appendix. Hearings before the Joint Subcommittee on Interstate and Foreign Commerce, November 20, 1916 to May 9, 1917.-- v. 3. Appendix. Hearing before the Joint Subcommittee on Interstate and Foreign Commerce, November 1, 1917 to December 19, 1917.

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Part 1. Alternating-current control devices and assemblies.--Part 2. Alternating-current controllers.--Part 3. Direct-current controllers.

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Cover title.

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"A summary report, January 1989."

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"B-214392"--Prelim. leaf [1]

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Issued jointly with the Office of Research and Development, EPA.