Workshop Technology
Thermit welding is often used in

Repairing broken shears
Joining rails, truck frames and locomotive frames etc.
Replacing broken gear teeth
All of these

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Workshop Technology
In permanent mould casting method

Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
Molten metal is poured and allowed to solidify while the mould is revolving
Molten metal is forced into mould under high pressure
None of these

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