GB/T 6683.4-2026

Petroleum and related products—Precision of measurement methods and results—Part 4: Use of statistical control charts to validate 'in-statistical-control' status for the execution of a test method standard in a single laboratory

石油及相关产品 测量方法与结果精密度 第4部分：使用统计控制图确认单个实验室执行试验方法标准处于“统计受控状态”