Placer mining
volume
British pronunciation/plˈeɪsə mˈaɪnɪŋ/
American pronunciation/plˈeɪsɚ mˈaɪnɪŋ/

"placer mining"の定義と意味

Placer mining
01

mining valuable minerals from a placer by washing or dredging

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placer mining

placer mining

Noun
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