| 单词 | board of trade unit |
| 释义 | > as lemmasBoard of Trade unit Board of Trade unit n. the commercial unit of electrical energy, equivalent to one kilowatt-hour of current; abbrev. B.T.U. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electrical power, electricity > [noun] > one thousand watts > commercial unit unit1886 Kelvin1892 kilowatt-hour1892 Board of Trade unit1913 1913 Metal Industry Handbk. 41/1 The Board of Trade Unit is the commercial standard for purposes of public supply, and is measured by the product at the rate of doing work into the hours divided by 1,000: hence 1 B.T.U. = 1,000 Watt hours. < as lemmas |
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