套管

Traditional form:

套管

Pinyin (reading):

tàoguǎn

Definitions:

• pipe casing

Characters:

• 套 - case, cover, envelope, wrapper
• 管 - tube, pipe, duct; to manage, to control

Traditional characters:

• 套 - case, cover, envelope, wrapper
• 管 - tube, pipe, duct; to manage, to control