main return

main return

[′mān ri′tərn]
(mining engineering)
The main return airway of a mine.
References in periodicals archive ?
There was a strong above-proportionate increase in profit from operations and the main return ratios over the previous year.
Roughly 70 ft (21 m) of the pipe failed when the plant automatically closed the main return valve against a full-speed 350 hp (261 kW) secondary pump.
The home club lost the considerable services of Paul Underwood during the close season, but they recruited well with Liam Dixon on song with bat and ball following his return from Annfield Plain, former junior Greg Patterson excelling on his comeback to the club, and Aussie first grade cricketer Rhys Jones also making a mark, although the opening bat's main return has come from his wickets and he'll certainly be one hoping that pitches firm up in the next few weeks.
The main return figures demonstrate that the Audi Group continues to be one of the world's most successful automobile manufacturers.
Air temperature, relative humidity, and air velocity sensors Sensor Name Sensors type Location RH12 Relative Humidity Main return air from zone to AHU AT12 Air Temperature Main return air from zone to AHU RH7 Relative Humidity Main supply air AHU to zone AT7 Air Temperature Main supply air AHU to zone AV1 Air Velocity Meter Supply air duct from AHU Table 2.
That, combined with the secrecy envelope and main return envelope, can exceed the 1-ounce weight limit for a 42-cent stamp.
In the end, the main return on investment--in Global and in the College--will be the enhanced ability of the Navy to pace global strategic developments.
Misery continues to be the main return so far on poor old Eddie Thompson's investment because Craig Brewster's influence, which is normally quick to spread, is still to have the desired effect.
Bazalgette was speaking at an event at the Cass Business School in London, staged by the forum Gambit and focusing on gaming on TV where he expressed the view that the mobile phone would be the main return path for betting in future technology.
2] concentration of the main return air is maintained at the preset set-point.