drawbackn.缺点;退税;退款;不利条件;弊
drawback piston回程活塞
drawback system[经] 退税制度
drawback spring复原弹簧
drawback factors阻碍因素
drawback analysis弊端
drawback movement倒退运动
drawback in design设计弊端
drawback of export出口退税
drawbacks of singing歌唱毛病
drawback certificate退税证书