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【地质行装】天府之国地下“黑金”宝藏:锰的现代“蝶变”
锰以各种形态隐匿于自然界中,无论是构成广袤大陆的岩石,还是茫茫无垠的大海深处,均有它的身影。不过大部分锰只是小有名气,能叫得上名号的当数“菱锰矿”“软锰矿”“硬锰矿”和“深海锰结核”。
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