| pumice |
Porous volcanic rock, used as an abrasive.
출처: www.howtocleananything.com/hca_glossay.htm
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|---|---|
| pumice |
A type of rock formed by volcanic eruptions. Pumice is light in weight because it is full of holes--as lava surfaces and cools, water vapor is expelled at high temperatures, creating these holes.
출처: www.digonsite.com/glossary/nr.html
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| pumice |
Light rock froth produced by the violent separation of gas from lava. Because of the many gas bubbles, some of this froth is so light that it floats on water.
출처: www.ngdc.noaa.gov/seg/hazard/stratoguide/glossary....
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| pumice |
A type of lava that is porous and mostly glass. In solid form, it is used in powdered forms as an abrasive.
출처: sherpaguides.com/california/mountains/appendices/g...
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| pumice |
A fine pumice powder used in the polishing process. Usually available in 90 and 180 grades.
출처: www.pledge.co.uk/ref/ch12c.htm
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