熱縮管

heat shrink tubing (aka heatshrink) (shrinkable plastic tube used to insulate wires)

variant of 管[guan3]

surname Guan

to take care (of) / to control / to manage / to be in charge of / to look after / to run / to care about / tube / pipe / woodwind / classifier for tube-shaped objects / particle similar to 把[ba3] in 管...叫 constructions / writing brush / (coll.) to / towards

to withdraw / to pull back / to contract / to shrink / to reduce / abbreviation / also pr. [su4]

to warm up / to heat up / hot (of weather) / heat / fervent