Diàngōng de gōngjùxiāng lǐ shǎobuliǎo yì kǔn zādài.
An electrician's toolbox always has a bundle of zip ties.
Tips
memory
扎 (zā) means 'to tie up / bundle' - same character as in 扎辫子 (tie up a braid). 带 is the strap. Together: a strap for tying. Visual mnemonic: each cable tie is one little 扎.
