He was able to wrap many turns of wire around an iron core without danger of circuits between the turns.

这样他便能够在铁芯上缠绕许多圈导线，而不会在线圈的匝间造成短路的危险。

youdao

He was able to wrap many turns of wire around an iron core without danger of circuits between the turns.

这样他便能够在铁芯上缠绕许多圈导线，而不会在线圈的匝间造成短路的危险。

youdao