An unbalanced line is generally a single-conductor shielded cable with the center conductor carrying the signal and the shield at ground potential.

对于非平衡式信号线来说，就是一根被屏蔽了的信号线，这个中心信号线传输信号，且相对于地电势。

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A coaxial cable consists of a single conductor surrounded by a shield (Figure 2-54a), while a triaxial cable adds a second shield around the first (Figure 2-54b).

同轴电缆由屏蔽包围的单芯导体组成(图2 - 54a)，而三同轴电缆在第一层屏蔽之外又加入了第二层屏蔽(图2 - 54b)。

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Yielding strength test: Cable shall not cause circuit breakdown, and cause short circuit between the conductor after tested by 15000 times return movement i. e. 30000 times of single route movement.

曲挠试验：在试验期间经15000次往复运动，即30000次单程运动后不发生电流断路，也不发生导体之间的短路。

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