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GB 12898-1991
GB 12898-1991 Specifications for the third and fourth order leveling
General Product Information
| Document Type | National standards |
|---|---|
| Publisher Name | The National Technical Supervision Bureau |
| Standard Status | Replaced |
| Standard Code | GB 12898-1991 |
| CCS | Geodetic and oceanographic mapping |
| ICS | Geology, meteorology, and hydrology |
| Implement Date | 1992-01-01 |
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$ 113