| crater |
bowl-shaped hole on a surface made by a volcanic explosion or the impact of a body such as a meteoroid.
출처: school.discovery.com/curriculumcenter/solarsystem/...
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|---|---|
| crater |
A hole or depression. Most are circular or oval in shape. On the Moon most are made by the impacts of meterorites.
출처: www.fi.edu/pieces/schutte/glossary.html
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| crater |
A naturally occurring hole. On Earth, a very few craters are formed by meteorites striking the Earth; most are caused by volcanoes. On the Moon, most craters were caused by meteorites. Some lunar craters were apparently formed by volcanic processes. In the formation of lunar craters, large blocks of rock (perhaps as large as several hundred meters across) are thrown great distances from the crater. These large blocks in turn from craters also-such craters are termed secondary craters.
출처: history.nasa.gov/EP-95/glossary.htm
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| crater |
a bowl-shaped depression or pit in the earth caused by an object's impact with the surface (meteor, bomb, volcanic debris, etc).
출처: www.ocean-institute.org/edu_programs/materials/P/G...
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| crater |
The small cavities left on the EDMed surface of the workpiece by the EDM sparks. Also known as pits.
출처: www.mmsonline.com/edm/glossary/am.html
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