United States Bureau of Mines

（重定向自US Bureau of Mines）

United States Bureau of Mines employee conducting a test, circa 1920

Former US Bureau of Mines Building in Pittsburgh.

For most of the 20th century, the United States Bureau of Mines (USBM) was the primary United States government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.

单词	US Bureau of Mines
释义	US Bureau of Mines 英语百科 United States Bureau of Mines （重定向自US Bureau of Mines） For most of the 20th century, the United States Bureau of Mines (USBM) was the primary United States government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
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