Hillhead 2012
19 - 21 June 2012
International live demonstration show for the quarrying, recycling and heavy construction industries at Hillhead Quarry, Buxton, UK.
triangulation
The process of dividing a large area into a network of triangles for survey purposes. All the angles and one side of one of the triangles (the base line) are accurately measured.
The monthly journal for the quarry products industry.