英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:

comptometer    
n. 高速度计算机之一种,其商标名

高速度计算机之一种,其商标名


请选择你想看的字典辞典:
单词字典翻译
Comptometer查看 Comptometer 在百度字典中的解释百度英翻中〔查看〕
Comptometer查看 Comptometer 在Google字典中的解释Google英翻中〔查看〕
Comptometer查看 Comptometer 在Yahoo字典中的解释Yahoo英翻中〔查看〕





安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Comptometer - Wikipedia
    The comptometer was the first commercially successful key-driven mechanical calculator, patented in the United States by Dorr Felt in 1887 It was a key-driven calculator that was extremely fast because each key adds or subtracts its value to the accumulator as soon as it is pressed
  • Comptometer Explained – Everything You Need To Know
    The comptometer was the first commercially successful key-driven mechanical calculator It was invented in 1862
  • Definition of Comptometer | PCMag
    The Comptometer was the first push button calculator and also the first calculator to achieve commercial success It could perform addition, subtraction, multiplication and division
  • How the Comptometer Works - YouTube
    A visual explanation of how the Comptometer, the first practical key-driven calculator, works Comptometers were manufactured continuously from 1887 until the 1970s
  • Comptometers - Computing History
    A Comptometer is a mechanical (or electro-mechanical) adding machine It was the first adding device to be operated solely by the action of pressing keys arranged vertically and horizontally Although primarily designed for adding, division, multiplication and subtraction could also be performed
  • comptometer - Maple Ridge Museum
    Comptometer training schools were established in 1905 to formalize operator training, and to teach new methods of calculation Comptometer schools typically recruited young women, and occasionally men of age 16





中文字典-英文字典  2005-2009