"One ventilation and Three Preventions" refers to ()
A. Ventilation, gas prevention, comprehensive dust prevention and water control
B. Ventilation, gas prevention, comprehensive dust prevention and fire prevention
C. Ventilation, gas prevention, fire fighting and water control
D. Ventilation, gas prevention, roof fall prevention and water control
Answer:B
"One ventilation and Three Preventions" refers to ()
A. Ventilation, gas prevention, comprehensive dust prevention and water control B. Ventilation, gas prevention, comprehensive dust prevention and fire prevention C. Ventilation, gas prevention, fire fighting and water control D. Ventilation, gas prevention, roof fall prevention and water control