The composition and basic principles of compound magnetic field separator for cleaning and the results of its laboratory and real application in a mine in Dandong are presented.

介绍了复合磁场精选机的组成、基本原理以及对丹东某矿实验室小型试验和实际应用的分选结果。

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Flame retardant selection and inflaming retarding principle are researched on winding cementing system of compound oxygen cylinder used for coal mine safe.

研究了煤矿安全用复合式氧气瓶缠绕胶接体系中阻燃剂的筛选及阻燃机理。

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The potassium compound is used in fertilisers and the UK's only current mine is at Boulby in North Yorkshire.

BBC: Sirius Minerals wins RGF cash for geosciences centre