By the dust particle charged theory, the test study on the main technical performance of four types of corona polars is carried, the best polar matching form of horizontal ESP is approached.

运用粉尘粒子荷电原理，对四种电晕极的主要技术性能进行了试验研究，探讨了卧式电除尘器的最佳极配形式。

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He is hoping to prepare for the cold and test his equipment at a cold chamber testing facility at Millbrook in Bedfordshire - recently used by Exmoor polar explorer Sir Ranulph Fiennes.

BBC: Devon