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| International Standard Category: Linear and angular measurements in general |
GB/T 18779.4-2020 Geometrical product specifications (GPS)—Inspection by measurement of workpieces and measuring equipment—Part 4:Background on functional limits and specification limits in decision rules
产品几何技术规范（GPS） 工件与测量设备的测量检验 第4部分：判定规则中功能限与规范限的基础 ;
| Category No.: | 17.040.01 | Valid Status: | valid |
| Issued Organization: | SAMR and SAMR | Issued Date: | 2020-12-14 |
| Implemented Date: | 2021-7-1 | Abolished Date: | |
| Superseded Standard.: | Superseded Date: |
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