如果将没有背板连接的特殊开关卡安装到主机的某个插槽，那么它和主机中安装的其它插卡则是电气隔离的。
If a particular switch card with no backplane connection is installed in a slot of the mainframe, it will be electrically isolated from other CARDS installed in the mainframe.
该仪器与机动车辆没有机械和电气连接。
This instrument has no mechanical and electrical connection with Automobile.
由于LVDT的传感器感应，现时并没有一条干净的遥感数据元素确保电气连接和长寿命。
As LVDT sensors are inductive, there is no electrical connection across the sensing element ensuring clean data and a long life.
注意，当7158型开关卡上没有通道被激励时，端子2和4是被连接到皮安计（pA）的LO端子的，它在电气上为保护端子。
Note that when none of the channels on the Model 7158 card are energized, terminals 2 and 4 are connected to the LO of the picoammeter (pA), which electrically is the guard terminal.
注意，当7158型开关卡上没有通道被激励时，端子2和4是被连接到皮安计（pA）的LO端子的，它在电气上为保护端子。
Note that when none of the channels on the Model 7158 card are energized, terminals 2 and 4 are connected to the LO of the picoammeter (pA), which electrically is the guard terminal.
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