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(Darsonval) [. . - (Perron)] (. 12.2.1912, , . ), , . . . 1925-30 ( . ; . , . , . . .). 1930-34 1936-53 ( 1940 - ). . , "-" " "; 1953-55 , , , . . . : . - (" "), (" " ), (" " ), Ը (" " ), . (" " . ); . - " " (. . ), " " (. . ); - , . 1938 ( , . . . ). . .: " " " " . (1938), " " (1939), " " - (1940), " " . (1946), "" (1941); "-" . - (1947) . 1957-59 . 1960 ; 1962 .

(: . , , 1981)
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