Pit Terminology - Glossary - Mines Rescue
You can also check the Durham Mining Museum and Ian Winstanley's Site. I have also used 'A Pit Terminology - Glossary Used in Coal Mining' a publication compiled by William Stukeley Gresley, dated 1883 and given to me by Philip Wyles.
Heavy equipment - Wikipedia
Heavy equipment refers to heavy-duty vehicles, specially designed for executing construction tasks, most frequently ones involving earthwork operations.They are also known as heavy machines, heavy trucks, construction equipment, engineering equipment, heavy vehicles, or heavy hydraulics.