Workshop Technology
Thermit welding is often used in

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

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Workshop Technology
The purpose of a gate is to

Delivers molten metal into the mould cavity
Feed the molten metal to the casting in order to compensate for the shrinkage
Delivers molten metal from pouring basin to gate
Act as a reservoir for the molten metal

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