Goods made of common metals and included in this class; leaching barrels of common metal; steel sections for use in building construction; road and railway bridges all made of steel; containers made of steel and included in Cl. 6; and colliery head gear towers and overhead reservoirs and tanks, all of common metal

Mechanical installations for the production of metals; industrial chemical installations; furnaces for the manufacture of cement and for burning lime and plaster of paris; and parts included in Class 11 of all the aforesaid goods; calcining kilns; apparatus for heating fine granular materials; apparatus for refining metals; mechanical roasting furnaces and kilns; apparatus for cooling dried brown coal; installations for use in concentrating and separating solutions; ventilators and fans; apparatus for purifying and washing minerals.

Machines in this class including machines and apparatus in Cl. 7 for the handling and preparation of minerals; machines and devices all for use in briquetting minerals; and parts included in Cl. 7 of all the aforesaid goods; screening and sifting machines; machines for sorting minerals (by size); centrifuges for the extraction of water; rotary pumps; machines for crushing, breaking and pulverising; mixing machines; filter presses (machines); rotary filters (parts of machines); magnetic separators and magnetic drums; all being parts of machines for separating magnetic materials from non-magnetic materials; dust separators (machines); centrifugal separators; air separators (machines); machines for drying solid materials; supports being parts of conveyors (machines); conveyors (machines); and apparatus for loading and unloading merchandise; precipitating drums (machines); and machinery For the treatment of raw lead; copper convertors in this class