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 Field Recording System便携式现场记录系统portable flange milling machine便携式法兰铣Portable video detection system便携式视频检测系统portable movie projecting truck轻便电影放映车portable radiation survey meter便携式辐射监测仪portable sand conditioning unit移动式混合砂处理装置Portable Atmospheric Noise Data轻便大气噪声数据采集系统portable water quality standard饮用水质量标准portable pneumatic extinguisher便携式风力灭火机portable cantilever floor crane轻便悬臂起重机