Hillhead 2012
19 - 21 June 2012
International live demonstration show for the quarrying, recycling and heavy construction industries at Hillhead Quarry, Buxton, UK.
pH
abbr. the potency of hydrogen
The pH scale represents the degree of acidity and alkalinity on a scale of 0 to 14; 0 is strongly acidic, 7 neutral and 14 strongly alkaline.
The monthly journal for the quarry products industry.