oil testing tra former 油试验变压器
high voltage testing tra former 高压试验用变压器
AC testing tra former 交流试验变压器
leakage testing tra former 漏电试验变压器
cascade testing tra former 级联试验用变压器
tra former testing i trument 变压器测试仪
testing tra former
测试变压器
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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