• 目的探讨螺旋缠绕固定中心静脉导管临床中的应用

    Objective To study the application of spiral fixation for central venous catheter in clinical nursing.

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  • 螺旋星系中的轨道速度并不会随著离开星系中心距离增加不停降低,它会平缓下来成为固定

    Orbital velocities in spiral galaxies, instead of declining with increasing distance from the galactic center, flatten out to a constant value, as predicted by MOND.

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  • 螺旋叶片固定中心形成一个整体置于螺旋阀体中间螺旋锁风阀体

    The spiral vane is fixed on the central shaft, forming a whole body which is disposed at the middle of the spiral air locking valve body and is firmly welded with the spiral air locking valve body.

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  • 螺旋叶片固定中心形成一个整体置于螺旋阀体中间螺旋锁风阀体

    The spiral vane is fixed on the central shaft, forming a whole body which is disposed at the middle of the spiral air locking valve body and is firmly welded with the spiral air locking valve body.

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