A tube is positioned within the coil and has a longitudinal axis that is substantially coincident with the axis of the coil.
一管内定位线圈和具有实质上是对线圈的轴同步纵轴。
2
The coil 10 has a first endwinding 12 that is substantially parallel to a longitudinal axis LA of the coil and a second endwinding 14 that is bent away from, or towards, the longitudinal axis.