Silica bricks
a mixture of tar and burnt dolomite bricks
either (a) or (b)
none of these
silica bricks
Bessemer process
Open hearth process
Duplex process
Electric process
basic Bessemer and acid open hearth processes
acid Bessemer and basic open hearth processes
acid Bessemer and acid open hearth processes
basic Bessemer and basic open hearth processes
alloy and carbon tool steel
magnet steel
high speed tool steel
all of these
The electric process of steel making is especially adopted to * alloy and carbon tool steel * magnet steel * high speed tool steel