
Specification for safety caps for writing and marking instruments
出版:British Standards Institution

專家解讀視頻
Three requirements, the application of any one of which will minimize the danger of asphyxiation of children should they accidentally inhale the cap.
? British Standards Institution 2013
Amendment notes:
AMD 6534 published 30 April 1990
AMD 6886 published 31 October 1991
ISO 11540:1993 - Identical