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Bell Telephone Companies
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著者:
technical personnel
American Telephone and Telegraph Company
Bell Telephone Companies
and Bell Telephone Laboratories ; [Robert H. Klie].
出版社:
Bell System Center for Technical Education,
出版日期: 1977.
文献类型:
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| 2. |
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著者:
technical personnel
American Telephone and Telegraph Company
Bell Telephone Companies
and Bell Telephone Laboratories ; [Robert H. Klie].
出版社:
Bell System Center for Technical Education,
出版日期: 1977.
文献类型:
|