The World Almanac and Book of FactsPress Publishing Company (The New York World), 1927 |
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第 1 到 3 筆結果，共 80 筆
第 頁
... electric iron possible . This is that electric iron . When you use it a while you can see why Westinghouse was willing to pay that large sum for the invention . Hundreds of thousands of women are now using this iron . You will be too ...
... electric iron possible . This is that electric iron . When you use it a while you can see why Westinghouse was willing to pay that large sum for the invention . Hundreds of thousands of women are now using this iron . You will be too ...
第 161 頁
... Electric motors in the United States to - day accomplish as much work as 170,000,000 men , which shows the economic importance of the electrie industry . Despite this fact only 65 per cent . of industrial power is supplied through ...
... Electric motors in the United States to - day accomplish as much work as 170,000,000 men , which shows the economic importance of the electrie industry . Despite this fact only 65 per cent . of industrial power is supplied through ...
第 164 頁
... electric field between the electrodes , the field being formed by solenolds through which The Poulsen the current feeding the arc flows . currents up to frequencies of 20,000 to 30.000 and are proved a very satisfactory generator of ...
... electric field between the electrodes , the field being formed by solenolds through which The Poulsen the current feeding the arc flows . currents up to frequencies of 20,000 to 30.000 and are proved a very satisfactory generator of ...
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