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если это необходимо
High Magnification: The 45X magnification is perfect for detailed examinations
which the instrument uses to determine unknown concentrations in samples
you can trust that this thermometer provides accurate temperature readings
Glass Prism for Stunning Light Refraction and Decor rapitest soil ph tester если это необходимоGlass Prism Diy Reflection Prisms Equilateral Prism, 50 X 50 Mm glass prism diy reflection prisms equilateral prism 50 mm x 50mm size, product description, description , this kind of optical glass prisms can reflect seven color sunlight . it can teach children to explore the mysteries of light, stimulate a child's thirst for knowledge, and improve the children's interest of understanding the magic world. size : 50*50*50*50 mm package included:
