138(2)
The tracing shall show the system of ventilation in the mine and in particular, the general direction of air-current, every point where the quantity of air is measured, every air-crossing, ventilation-door, stopping, booster fan and any other principal device for regulation and distribution of air, fire-dams, preparatory stoppings, every fire-fighting equipment, every water dam with dimensions and other particulars of construction, every pumping, telephone and ambulance station, every room used for storing inflammable material, reserve stations and every haulage and travelling roadway.