
【国外标准】 The sending part of the multifrequency signalling equipment
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2025-06-10
- ITU-T Q.454
- 现行
- 定价: 无文本
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适用范围:
暂无
标准号:
ITU-T Q.454
标准名称:
The sending part of the multifrequency signalling equipment
英文名称:
标准状态:
现行-
发布日期:
2025-11-01 -
实施日期:
出版语种:
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