基本解释[经济学]屏蔽变压器词组短语短语shielded d transformer 屏蔽变压器oil gas shielded type transformer 充油封闭式变压器super shielded transformer 超隔离efficacy measurement of shielded transformer 屏蔽效能测试shielded transformer更多词组专业释义经济学屏蔽变压器