Metal magnetic memory ( MMM ) testing method can find the stress concentration area.

采用磁记忆 无损 检测方法可以检测出应力集中区.

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Xiongershan is an important concentration area of gold mineralization in western Henan.

熊耳山地区是豫西重要的金矿化集中区.

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Jiujiang - Ruichang ore concentration area is a important part of middle to lower Yangtze Cu - Au mineralizing belt.

九瑞矿集区是长江 中下游 铜金成矿带的重要组成部分.

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Yinkeng area an ore concentration area of gold , silver, copper, lead zinc, manganese in east Jiangxi.

江西于都银坑地区是赣南东部的金银铜铅锌锰等矿集区.

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