I crown the six palaces with beauty. | #3

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I crown the six palaces with beauty. | #3

I crown the six palaces with beauty.

I crown the six palaces with beauty.

Original title: The most complete knowledge of open-pit mines has been collected by miners! Strip mining is the extraction of valuable minerals from open pits. Mechanical mining: mining hard ore and rock, with deep-hole blasting and mechanical mining as the main means to obtain ore.

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