PT孔包括插IC引脚的零件孔(Component hole)与连接不同层间的过孔(ia hole)，PT孔的孔壁上有铜作为导通介质；NP孔包括固定板卡的机械孔等，孔壁无铜。
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through-hole component 穿孔式元件 ; 通孔元件
hole component 霍尔元件
open-hole component 开孔构件
Drill hole component 钻孔元件
Removed from the circuit board through-hole components via multi pin component and the large heat capacity is quite troublesome, such as transformer, connector.
从电路板上拆除多引脚的通孔元件和大热容量的通孔元件比较麻烦，比如变压器、接插件。
In addition, we directly observe the contribution of the light hole to the conductivity tensor component.
此外，在实验中，还直接观察到了轻空穴对电导张量分量的贡献。
The system used the I/O data collection card to collect the signal of Hole component, photoelectric sensor and coder.
通过I/O 数据采集卡收集外部霍尔元件、光电传感器及编码器提供的信息。
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