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.

WSJ: Lucas Duda homers in Mets' win over Braves

Mets starter Matt Harvey finished his spring on a high note, giving up three hits and no runs in four innings.

WSJ: Mets' Wright makes first appearance in 2 weeks

In March, Kelly announced Gunner Kiel, one of the top-rated quarterbacks coming out of high school a year ago, was leaving before even trying to challenge Golson for the starter's job during spring practice.

NPR: Golson Suspended For Poor Academic Judgment