Hillhead 2012
19 - 21 June 2012
International live demonstration show for the quarrying, recycling and heavy construction industries at Hillhead Quarry, Buxton, UK.
efficiency
- The ratio of useful output energy to input energy.
- The efficiency of a simple machine is defined as the ratio of the force ratio to the movement ratio.
Also: screening efficiency
The monthly journal for the quarry products industry.