双语资源
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1 英文课程案例
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2 英文注释图片
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1.Applications of pneumatics
2.Components of a hydraulic system
3.Hydraulic graphic and symbols of cylinders
4.Hydraulic Graphic and symbols of directional control valves
5.Hydraulic Graphic and symbols of flow control valves
6.Hydraulic Graphic and symbols of pressure valves
7.Hydraulic Graphic and symbols of pumps and motors

































