mining equipment equipment life useful life data. 0 years useful life 00 000751 1 year useful life 01 000710 10 years useful life 10 000711 11 years useful life 11 000712 12 years useful life 12 000713 13 years useful life 13 equipment, mining & test 000250 equipment, misc. graphic art 000301 equipment, misc. scientific 018008 000201 equipment, office 000418 …