讨论了有限长载流疏绕螺线管内轴线上的磁场，并与载流密绕螺线管内轴线上的磁场作了比较。
This paper discusses the magnetic field on the axis in a current-carrying sparse winding solenoid with limited length.
金属屏蔽层采用疏绕铜丝和铜带，铜丝的标称截面95mm2，也可以根据使用要求进行设计不同截面的金属屏蔽层。
Metal screen adopts cu wire winded sparsely and cu tape wrapped. The nominal cross-section area of the wire is 95 mm2, different cross-section area can be designed for various application means.
金属屏蔽层采用疏绕铜丝和铜带，铜丝的标称截面95mm2，也可以根据使用要求进行设计不同截面的金属屏蔽层。
Metal screen adopts cu wire winded sparsely and cu tape wrapped. The nominal cross-section area of the wire is 95 mm2, different cross-section area can be designed for various application means.
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