Hillhead 2012
19 - 21 June 2012
International live demonstration show for the quarrying, recycling and heavy construction industries at Hillhead Quarry, Buxton, UK.
fine-adjustment screw
A fine-adjustment screw fitted on both the horizontal and vertical circles of a theodolite for the purpose of moving the line of sight through small angles.
Also: tangent screw
The monthly journal for the quarry products industry.