实践证明，在勘探开发程度较高的老区，滚动勘探是行之有效的勘探方式，值得在类似地区推广。
The practice has showed that, progressive exploration was an effective method for old areas which were relatively mature in exploration and development, and was worth of spreading in similar areas.
实践证明，在勘探开发程度较高的老区，滚动勘探是行之有效的勘探方式，值得在类似地区推广。
The practice has showed that, progressive exploration was an effective method for old areas which were relatively mature in exploration and development, and was worth of spreading in similar areas.
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