Where does this definition of ball safety valve come from?
This entry for ball safety valve is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Does ball safety valve appear elsewhere on Lughet?
Yes — ball safety valve appears under other sources or language pairs in Lughet's collection. See the list below.
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.
