radial varying pitch
... 径向式叶轮 radial vane impeller 径向变螺距 radial varying pitch 径向矢量 radial vector ...
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径向]变距螺桨 variable pitch propeller ; varying pitch propeller
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鉴于此，笔者试图设计泵阀的变螺距弹簧，以消除阀盘的纵向振谐窜动和径向失稳漂移，提高泵阀工作寿命。
In view of this, a variable pitch valve spring is designed to eliminate the axial shifting and radial drifting of the valve disk and improve the service life of the valve.
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