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.
/breathÂ·ing/ (brÄthÂ´ing) ventilation (1). frog breathing , glossopharyngeal breathing breathing in which air is âswallowedâ into the lungs by the tongue and muscles of the pharynx, unaided by primary or ordinary accessory muscles of respiration; used by those with chronic muscle paralysis to augment their breathing.