When two-arm robot is equipped with force sensor, the effective stiffness of the end - effector play an important role in the system stability.
当机器人双手装上力传感器之后，机械手末端组合刚度对系统稳定性影响较大。
The pile stiffness is reduced by the pile-pile interaction and the effective length of piles becomes longer.
桩桩相互作用降低了桩的刚度，并使群桩的有效桩长加大了。
For most effective play, the club should have a firm shaft. Course owners are permitted to check shaft stiffness before play begins.
为是打球更有效，球杆应该有一个坚固的轴。在开始比赛前，应当允许球道主人检查轴的紧固性。
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