ITU-T Recommendation E.421 was published in Fascicle II.3 of the Blue Book. This file is an extract from the Blue Book. While the presentation and layout of the text might be slightly different from the Blue Book version, the contents of the file are identical to the Blue Book version and copyright conditions remain unchanged (see below).
ITU-T E.421 SPANISH-1993由国际电信联盟 IX-ITU 发布于 1993-01-01。
ITU-T E.421 SPANISH-1993 在中国标准分类中归属于: M10 通信网综合。
* 在 ITU-T E.421 SPANISH-1993 发布之后有更新,请注意新发布标准的变化。
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