portable ram外置式油缸portableadj.轻便的；手提式的；[计]可移植的n.便携的东西portable automatic tide gauge便携式自动潮汐计,便携自动水位计portable antiaircraft missiles便携式防空导弹Portable Arming System Trainer便携式解保系统训练器portable contaminant collector携带式污染物收集器portable insulin infusion pump便携式胰岛素灌注泵portable poisonous gas monitor便携式有毒气体监测仪portable automatic gas monitor便携式自动瓦斯监测仪portable bit error rate tester便携式误码仪portable life-support system轻便式生命保障设备portable electronic typewriter便携式电子打字机