A new hydraulic load simulation system, adopting a rotation directional valve and using a spring accumulator simulating the starter load, is proposed and working principles are described.

提出了一种采用旋转式换向阀及弹簧蓄能器模拟发动机负载的液压负载模拟系统，详细介绍了该系统的工作原理；

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With Santana not ready to start the season, Collins said that Aaron Laffey might also get a look as a potential starter before spring training is over.

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