- 水: water
- 动力: motive power; power; dynamic
- 平衡: balance; equilibrium
- 水动力平滑面: hydrodynamic smooth surface
- 动力平衡: balance of power; dynamic balance; dynamic epuilibrium; dynamic equilibrium; dynamical balancing; equilibrium, dynamic; kinetic equilibrium; kinetic stability; motion compensation; motor balance; power balance
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