number-unobtainable
adjective
Denoting a sound indicating to a caller that the telephone number dialled is unobtainable for a reason other than its being engaged.
Origin
1930s; earliest use found in Glossary Terms Telegraphs & Telephones.
| 单词 | number-unobtainable |
| 释义 | number-unobtainableadjective Denoting a sound indicating to a caller that the telephone number dialled is unobtainable for a reason other than its being engaged. Origin |
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