“beach placer”的概念、定义、翻译、参考文献-科学参考

单词	beach placer
释义	beach placer Encyclopedia 理学海底矿产资源释 beach placer海滨砂矿砂金、砂铂、金刚石、砂锡、石英、金红石、锆石、独居石、钛铁矿等有用矿物以及贝壳砂、砂砾在海滨地带富集而成的具工业价值的海底矿产资源。
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