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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Keithley's low Level Measurements Handbook provides more information about using coaxial and triaxial cables and connectors, including low noise cables, and cable and connector assembly.

Keithley的《低电平测量手册》提供了关于使用同轴电缆和同轴三芯电缆的更多信息，包括低噪声电缆，以及电缆和连接器成套件。

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