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evaluation估价(指对人,事物的估价)even-order higher harmonics偶次谐波examination and approval审批examination and verification审核examination of the de-energised overhead contact line断电检查架空接触网excavator挖掘机excavation work挖方工程,挖方excavation开
even-order higher harmonics examinations and approval examination of the de-energized overhead contact line disconnection inspection overhead contact network excavator excavation work excavation work excavation work Excavation excavation open