This video shows why you cant always trust all information on the internet, as well as shows the basics of torque wrenches and a few oddball calculations you might run across when building custom things.
Underground mine ventilation. Underground mine ventilation provides a flow of air to the underground workings of a mine of sufficient volume to dilute and remove dust and noxious gases (typically NOx, SO2, methane, CO2 and CO) and to regulate temperature.
Define ventilation. ventilation synonyms, ventilation pronunciation, ventilation translation, English dictionary definition of ventilation. n. 1. a. The replacement of stale or noxious air with fresh air. b. The mechanical system or equipment used to circulate air or to replace stale air with...