"valkenburgh, van . "
basics synchros & servomechanisms: / van.. valkenburgh - 1 ed. - uk : techinical press 1964. - ", 110p.; 25 cm."
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629. 832 3 val
basics synchros & servomechanisms: / van.. valkenburgh - 1 ed. - uk : techinical press 1964. - ", 110p.; 25 cm."
--
629. 832 3 val