For the complexity of efficiency conversion of prototype and model hydraulic turbines many calculation formula are put forward but there is not universal formula.

由于原型与模型水轮机效率换算的复杂性，尽管已提出许多计算式，但至今仍未有一个被一致确认的统一公式。

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At the same time, the method and basic theory of dynamics software ADAMS are introduced. The project studies the key technical problem of establishing hydraulic support virtual prototype model.

同时，介绍了多体系统动力学软件ADAMS的基础理论和方法，研究了建立液压支架虚拟样机模型的关键技术问题。

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This type of flow sensor is widely needed in the flow control systems and has been successfully used in the home-produced prototype hydraulic elevator with flow electrical feedback control system.

作者研制的动态流量计是国内流量控制系统中所缺乏和急需的器件，已成功地应用在国产液压电梯流量反馈控制样机上。

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The XOS 2 is nearly usable for the latter job, but even at 50 percent more efficient than the original (by the company's last count) it's still a prototype that requires a tethered high-pressure hydraulic engine to function.

ENGADGET: Raytheon's Sarcos XOS 2 military exoskeleton just does the heavy lifting -- for now