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US4689864A Method of making valve sleeves 失效
制造阀套的方法

Method of making valve sleeves
摘要:
A method of making valve sleeves used for controlling the flow of hydraulic fluid in devices, such as power steering units in motorized vehicle, and the product of the utilized method. The method utilizes a grooving male die which forms a groove on an interior surface of a valve sleeve.
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