my farst day of school ? 我给第二个[723]天的学校 Choke Core ? 呛核心 Annotate the letter to identify the position of key items of information ? 注释信，以确定关键项目的信息的位置 ..
Pipe series: Elbow, tee, cross, movable joint, Bu core, reducer, pipe cap, choke plug, inside the wire, outside the wire, turned-over edge, increaser etc.
管件类： 弯头、三通、四通、活接头、卜芯、大小头、管帽、堵头、内丝、外丝、翻边、异径管。
3
A differential-mode choke and a separate common-mode choke can be combined onto a single core.