短語詞組短語carrier troughing impact idler 緩沖托輥組carrier troughing transition idler 過渡托輥組adjusted carrier troughing transition idler 可變槽角過渡托輥組self -troughing idler 自動(dòng)成槽托滾deep troughing idler 深槽形托輥carrier troughing idler 槽形托輥組 返回 troughing idler