51.
The portion of the blast furnace below its widest cross-section is called

52.
The silicon steel is widely used for

53.
Connecting rod is usually made of

55.
Compressive strength of grey cast iron in tonnes/cm is of the order of

56.
Y-alloy contains

57.
Wrought iron

58.
White cast iron

59.
When the steel is normalized, its

60.
Amorphous material is one

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