Cobalt (II) chloride is deep blue when dry (anhydrous) and pink when moist (hydrated).

钴(II)氯化物在无水状态时呈深蓝色时，吸湿后呈粉红色。

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So the paper not only seems useful to deep-sea cobalt crust mining, but also offers a new design method and powerful tool for traditional spiral drum cutting head's parameters designing.

因此，本论文不仅对开发大洋钴结壳等矿产资源具有十分重要的意义，同时它也为传统的螺旋滚筒式采矿头参数设计提供了一种新的设计方法和有力的手段。

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A series of supported copper, cobalt and copper-cobalt composite catalysts were synthesized by solid state reaction, and used for the deep catalytic oxidation of o-xylene.

采用低温固相法制备了系列负载型铜、钴以及铜钴复合催化剂，用于邻二甲苯的深度催化氧化，以邻二甲苯的分解率和二氧化碳产率综合评价催化剂的活性。

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