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海滨砂矿
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海滨砂矿
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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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semi-star
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semi strictly diagonally dominant matrix
semi-strictly diagonally dominant matrix
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semi-strong linear element
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semi-submersible drilling platform
Semi-submersible drilling Platform 981
semisubmersible drillingplatform up
semi-submersible platform
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