Workshop Technology
When filing soft metals, the file teeth are clogged with minute particles of metal. The file should be cleaned by

Washing it with dilute acid
Washing it with water
Using file card
Rubbing on wood

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Workshop Technology
In a hot chamber die casting machine

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

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