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| 2 | ISO 1101, Geometrical product specifications (GPS) — Geometrical tolerancing — Tolerances of form, orientation, location and run-out |
| 3 | ISO 9000, Quality management systems — Fundamentals and vocabulary |
| 4 | ISO/TR 22514-4, Statistical methods in process management — Capability and performance — Part 4: Process capability estimates and performance measures |
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