【化】 扼流圈; 扼流线圈

[ noun ]
a coil of low resistance and high inductance used in electrical circuits to pass direct current and attenuate alternating current
<noun.artifact>

Choking coil \Choking coil\ (Elec.)
A coil of small resistance and large inductance, used in an
alternating-current circuit to impede or throttle the
current, or to change its phase; -- called also {reactance
coil} or {reactor}, these terms being now preferred in
engineering usage.
[Webster 1913 Suppl.]