Engineering student works on a calculator
An Engineering student works on a calculator. (c. 1950s)
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| 主要作者: | |
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| 格式: | Online |
| 出版: |
1950
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| 在线阅读: | http://cdm17321.contentdm.oclc.org/cdm/ref/collection/photos/id/4367 |
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