露天矿矿图 [矿业] opencast mining plan
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这张太空照片为我们展示了位于亚利桑那州绿谷镇（Green Valley，位置见文末图）西部及西北部的三个露天矿。
This astronaut photograph illustrates three open-pit mines located west-northwest of the town of Green Valley, Arizona.
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露天矿生产过程中，需要及时提供采剥工程平面图。
It is necessary that stripping plan be timely provided during the opencast mining.
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