短語詞組短語power transformer with off -circuit tap-changer 無載調(diào)壓電力變壓器transformer with off -circuit tap-changer 無勵磁調(diào)壓變壓器linear off -circuit tap changer 線性調(diào)無勵磁分接開關(guān)series -parallel off-circuit tap changer 串開聯(lián)無勵磁分接開關(guān) 返回 off-circuit tap-changer