Thin line dot standard micrometer | | Model:   |
|   Optical standard ruler | | Optical standard ruler optical standard |
| Dual Axis Linear Scale Stage Micrometer | | Dual Axis Linear Scale Stage Micrometer: |
| Depth of field measuring block | | Measuring the depth of field of the |
| Multi-frequency grid calibration plate | | Multi-frequency solid circular array
Model: |
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