Coloured scanning electron micrograph (SEM) of perlite. Perlite is volcanic glass that has been heated until it expands to many times its original size. It has a number of uses in industry, including in construction materials, filtration systems and as a soil improver in agriculture and horticulture. Magnification: x300 when printed at 15cm wide.

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TOP29066703

Source:

達志影像

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RM

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須由TPG 完整授權

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