Equipment Company Handbook Copyriqht 1954 by Denver Equipment Company 1400 Seventeenth Street ... Denver 30" Convertible Ball Mills are furnished with scoop feeders with replaceable lips. Standard mills are furnished ... 7 Ft. Sire of Crusher 20 Inch 2 Ft. 3 Ft. 4 Ft. 4% Ft 5% Ft 7 Ff.