Workshop Technology
The current in electric resistance welding can be regulated by

Changing the primary turns of the transformer
Changing the secondary turns of the transformer
Varying the input supply
Any one of the listed here

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Workshop Technology
In a hot chamber die casting machine

Ferrous alloys with high melting temperature are casted
Nonferrous alloys with high melting temperature are casted
Ferrous alloys with low melting temperature are casted
Nonferrous alloys with low melting temperature are casted

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