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Calibration Target Board
The Coated Optical Filters Ready For Out of The Pot---Optical Filters / Light Filter
Encoder Disk/Encoding Disk
How's the optical lenses produced?
Calibration Glass Ruler /Standard Glass Scale
Resolution Test Board
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What is chrome mask blank/photomask blanks?
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What is absolute photoelectric/encoder scale/encoder disk/code plate?
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Ceramic pressure sensor core
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Introduction of reflective grating strips and grating discs encoder disk grating ruler
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