| Type: | Roughness Calibration Block | Standard: | GB/T19067.1-2003 And ISO5436-1:2000 |
|---|---|---|---|
| Material: | Optical Glass | Specification: | Ra=5.84um |
| Highlight: | surface roughness test reference block,multi-engraved lines roughness block,Ra 5.84um standard roughness tester |
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