Wudi has three world-rare shell placer deposit belts. Stretching a total distance of 56 kilometers, these deposits have total reserves of 360 million tons.

 
  • 无棣县拥有3条长56公里,总地质储量3.;6亿吨世界罕见的贝壳沙矿带,具有很高的开采利用价值。
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