private wire
Telephony
noun
1= private line.
2A wire in an exchange used to test whether a line is in use without intrusion on a call in progress.
Origin
Mid 19th century.
| 单词 | private wire |
| 释义 | private wireTelephony noun 1= private line. 2A wire in an exchange used to test whether a line is in use without intrusion on a call in progress. Origin |
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