खोजें
underground mine ventilation
/ˌʌndɚɡɹˈaʊnd mˈaɪn vˌɛntɪlˈeɪʃən/
Underground mine ventilation
01
the system that supplies fresh air and removes contaminants from underground mines
व्याकरणिक जानकारी
उदाहरण
The underground mine ventilation was upgraded to handle the deeper workings.
LanGeek
