Therefore, it has important practical significance to study the fault diagnosis technology of transformer in order to improve the level of operation and maintenance of the transformer.

因此，研究变压器内部故障诊断技术，提高变压器的运行维护水平具有重要的现实意义。

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Power grid dispatching automation system is an important means to ensure power grid to operate in a safe, reliable, stable and economic way and improve the management level of operation.

调度自动化系统是保证电网安全、可靠、稳定以及经济运行和提高调度运行管理水平的重要手段。

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Paradox 2-the paradox in the level of operation, that is, the paradox inacquiring the concrete capitalization rate.

悖论2—操作层面的悖论，即具体资本化率求取时的悖论。

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This level of co-operation is necessary to allow Iraqi officials to provide for the security of the inspectors.

BBC: Iraq arms teams under pressure

"The level of co-operation between two countries has been good, " the official added.

CNN: BP fears 'the worst' for missing Algeria workers

Australia's Department of Agriculture, Fisheries and Forestry said in a statement it was "pleased with the level of co-operation" from the Egyptian authorities.

BBC: Australia halts cattle exports to Egypt over 'cruelty'