The World Almanac & Book of FactsNewspaper Enterprise Association, 1929 |
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第 1 到 3 筆結果,共 81 筆
第 128 頁
... operation of aircraft on schedule time under various weather conditions . For overcoming fog and other conditions of poor visibility , radio is of invaluable assistance . The problems of the noise of the airplane motor and shielding ...
... operation of aircraft on schedule time under various weather conditions . For overcoming fog and other conditions of poor visibility , radio is of invaluable assistance . The problems of the noise of the airplane motor and shielding ...
第 142 頁
... operation , while 47 ships were sold for restricted operation and one ship for unrestricted service in connection with the sale of five line services . 45 of the 47 ships sold for restricted operation were included in the sale of four ...
... operation , while 47 ships were sold for restricted operation and one ship for unrestricted service in connection with the sale of five line services . 45 of the 47 ships sold for restricted operation were included in the sale of four ...
第 149 頁
... operation within the past few years 14 of these lines , which , under the encouragement of the recent legisla- tion passed by the Congress , give promise of con- tinued successful operation . " Through the cooperation of the Post Office ...
... operation within the past few years 14 of these lines , which , under the encouragement of the recent legisla- tion passed by the Congress , give promise of con- tinued successful operation . " Through the cooperation of the Post Office ...
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