流体在通过直喷式柱型液压控制阀阀芯时，阀内形状的变化使流体的运动量发生变化。
In jet oil hydraulic spool valves, the oil flows through a rush path because of the shape changing of the valve.
文字采用铜制反槽型字镀钛金效果；内充pvc实心内芯；厚度20毫米。
Letterform adopt invert copper letters plating with titanium effect; inside PVC core; thickness 20mm.
该型芯能用控制型芯表面质量的方式来避免铸件内孔中产生的系列疵病。
The core can effectively avoid defects of vent by controlling quality of mold surface, and it can also be used in structure of castings which is like s hole as well as hole of intricate bore.
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