external ram外置式油缸externaladj.外来的；外部的；外面的；表面的n.外观；外部；外界事物external modulation source外部调谐源external interrupt control外部中断控制external pudendal arteries阴部外动脉external fired superheater外燃式过热器external impressed current外接电流external knowledge sources外部知识源external vitreous membrane萨耳茨曼(氏)膜:玻璃体外膜external application drugs外用药externally applied tanking外贴地下防水层external-device response外部设备响