The state of the circuit (open or closed) determines the jumper setting.

电路的状态(开或闭)决定了跳线设置。

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Represents a spring return (break). Circuit can be specified as open or closed.

表示弹簧复位（断开）。可指定电路为断开或接通。

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An analysis of the antenna and scattering theory is an important part in the electromagnetic problems, which describes the energy transformation from a closed circuit system to an open space system.

电磁问题中有很大一类是研究天线和散射理论，即由封闭电路系统向空间开放系统的能量转换。

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Compared with Nascar's traditional oval tracks and closed wheel cars, every F1 circuit is a winding roller coaster and every car a unique open-wheel marvel of technology.

WSJ: 2012 U.S. Grand Prix: The Best Little Road Course in Texas