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 bracket of lower limb便携式下肢手术支架portable air life support unit便携式空中生命保障装置Portable Alignment Gyrocompass轻便校准陀螺罗盘portable extinction photometer手持式消光光度计portable sound slide projector便携式有声幻灯机portable motion picture camera手提活动摄影机Portable Heat Rejection Systemportable early-warning radar轻型预警雷达portable diving air compressor便携式潜水空气压缩机portable oxygen generation bag便携式产氧袋