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phosphatic rock
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phosphatic rock
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理学
磷质岩
释
phosphatic rock
磷质岩
富含磷酸盐矿物(主要是磷灰石)、五氧化二磷(P2O5)含量大于18%的化学-生物化学沉积岩。又称沉积磷酸盐岩、磷灰岩、磷酸盐岩、磷沉积岩、沉积磷岩、磷岩等。
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direct summand
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direct sum of groups
direct sum of ideals
direct sum of modules
direct sum of objects
direct sum of representations
direct sum of rings
direct sum of sets
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