请注意，在高频下，电缆的物理长度与其电气长度不同。
Note that at higher frequencies, the physical length of a cable is different from its electrical length.
电气系统包含长度测量系统和控制系统。
The electrical system contains length measuring system and controlling system.
电气系统包含长度测量系统和控制系统。
The electrical system contains length measuring system and controlling system.
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