STANDARDS
Standards and verification regulations
GB/T test methods, JJG verification regulations and ISO/ASTM international standards for hardness, metallography, dimensional metrology and environmental testing — 44 entries grouped by product line.
GB/TNational standard1 项
| Standard | Title | Scope | |
|---|---|---|---|
| GB/T 1957 | Plain limit gauges — Technical specifications | 产品标准 | Products |
How to use
- Always refer to the currently valid edition. Numbers here omit the year; state the edition year in purchase and acceptance documents.
- JJG are verification regulations used for annual metrology inspection; GB/T are test-method or product standards used for acceptance and test reports.
- Export projects often require ISO 6507/6508 together with ASTM E18/E384; matching calibration certificates ship with the machine.
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