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GB/T 40873-2021 The expertise for oceanic cobalt-rich ferromanganese crusts exploration 大洋富钴结壳资源勘查规程 - 英文版 |
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GB/T 17229-1998 The expertise for oceanic polymetallic nodules survey 大洋多金属结核矿产勘查规程 - 英文版 |
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