特殊用法band changing1.频带变换daylight changing1.日光变化gear changing1.换齿轮gear changing by foot1.脚踏换挡[变速]instantaneously changing1.瞬跳no-load speed changing1.空载变速on-load tap changing1.带载调节接点pole changing1.换极, 极性变换roll changing1.换辊scene changing1.换布景tap changing1.抽[分接]头转换