Strong knowledge in mechanical principle, various mechanisms, pneumatic and hydraulic systems.

强的知识在机械原则，各种各样的机制，气动力学和液压机构。

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Familiar with hydraulic systems, pneumatic components, solenoid valves, and mechanical drive system, understand PLC control theory.

熟悉液压系统，气动元件，电磁阀，及机械传动系统，了解PLC控制原理。

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Install or modify aircraft engines and mechanical, hydraulic, flight control, fuel and pneumatic systems.

安装或修改飞机发动机，机械，液压，飞行控制，燃油和气动系统。

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It would rely more on electricity to run its systems than existing planes, which used hydraulic and pneumatic power.

WSJ: Boeing Shows How Innovation Can Be Messy