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Gem Refractometers Built-in LED CL-181BI

Gtech Co.,LTD.

Gem Refractometers Built-in LED CL-181BI

Gem Refractometers Built-in LED CL-181BI

Description BI means built-in LED Gem Tester Refractive index is one of most important optical parameter. Gloss of gem can be estimated by the parameter. The kinds of gem can be precisely determined ...

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