- Sino Science & Technology Co.,Ltd.
- Main products: refractometer;gem identification tools, thermometer
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All Products
- magnifier
- table digital refractometer
- digital refractometer PDR28S
- sell PH meter PH0001
- gem loupe
- gem loupe
- mini gem balance
- Pocket gem balance
- Shortwave/Longwave Ultraviolet Lamp
- gemological microscope
