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surface mining | operation
 operation
agric. întreprindere; proces de muncă; proces de funcționare a mașinii; muncă; lucru; activitate

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surface mining

jewl. Mining that takes place when the stones can be found close to the surface. This type of mining entails little heavy equipment as only the soil and overlying mineral deposits are removed. Surface mining is most commonly used to retrieve coal deposits.
surface mining
: 1 phrase in 1 subject
Mining1

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