flexible bag软油箱flexibleadj.柔韧的；灵活的；易弯曲的；可变通的flexible arrangement灵机安排flexible pumping rod柔性抽油杆flexible anchor tray柔性锚盘flexible tool system柔性刀具系统flexible stay-bolt活动炉撑flexible obstruction挠性障碍物flexible joint model柔性节点flexible deformation弹性位移flexible valve clack柔性阀瓣flexible drive shaft软驱动轴