From there, a larger cable is run a few times around a hollowcoil.
从此以后，一个更大的电缆运行几次约一空心线圈。
2
By electromagnetic theory analysis, this paper presented a planar hollowcoil current transformer based on printed circuit board (PCB).
通过电磁理论分析，提出了一种基于印刷电路板(PCB)的平面型空心线圈电流互感器。
3
Stainlesss steel coil stainless steel pipe is a hollow, the production process for different types of technical difficulty is more difficult, so when the processing is should be particularly careful.