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- ITU-T Q.140-Q.180 Specifications of Signalling System No. 5
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适用范围:
暂无
标准号:
ITU-T Q.140-Q.180
标准名称:
Specifications of Signalling System No. 5
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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