Slide Ruler Art 40X Microscope

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Precision Ocular Micrometer Microscope Micromet...

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Microscope Micrometer Calibration Ruler Film

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แผ่นใสมาตราฐานเพื่อตรวจสอบงาน, Ruler Microscope...

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TOSUKKI Multifunction Microscope Micrometer Cal...

Calibration of microscope measurement by calibr...