Where does this definition of 声频载波电报测试仪 come from?
This entry for 声频载波电报测试仪 is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
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.