To obtain the phase of line is important in the design of power electronic equipments.

准确获得电网电压的相位角，在电力电子装置设计中有重要的意义。

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But further laws will need to be passed before construction on phase two of the line, scheduled to be completed in 2032-2033, can take place.

BBC: HS2 legislation outlined in Queen's Speech

He said the final phase of work on the line was due to be completed by 2021.

BBC: Question Time

So far Warwickshire has generated most of the headlines, especially in the towns and villages on the line of the first phase between London and Birmingham.

BBC: HS2 spells double trouble in next week's council poll