ān​quán​xiàn

safety line

安全线 安全線 ān​quán​xiàn
safety line
A warning line marked on the ground that people should not cross, used to maintain order or prevent accidents.
security thread
A metal or plastic strip embedded in the paper of banknotes, passports, or other documents as a counterfeit prevention measure.
safety limit
A safe threshold or limit for economic factors such as prices, interest rates, or debt.

Frequency

Movie subtitles
0.180 per million appears in 0% of films
Written text
0.236 per million

Sources