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| Chinese National Standard Category: Communication network in general |
| English Title: | 5-unit numerical code for telegram service |
| Chinese Title: | 电报用五单位数字保护码 |
| Standard No.: | GB/T 7554-1987 |
| Category No.: | M10 |
| Issued by: | AQSIQ |
| Issued on: | 1987-3-26 |
| Implemented on: | 1987-1-1 |
| Status: | valid |
| Superseded by: | |
| Superseded on: | |
| Abolished on: | |
| Superseding: | |
| Word Count: | 2000 words |
| Similar Standards: | GB/T 11591-1989 YD/T 4159-2022 YD/T 4164-2022 YD/T 4150-2022 YD/T 4160-2022 GY/T 352-2021 DB37/T 3645-2019 T/CCSA 229-2018 YD/T 2093-2018 YD/T 3314-2018 GB/T 34084-2017 GB/T 34082-2017 YDB 162-2015 YDB 164-2015 YDB 157-2015 GB/T 29198-2012 DB31/T 534-2011 YD/T 2057-2009 YD/T 2016.2-2009 YD/T 2021-2009 |
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