Workshop Technology
For arc welding

Any one of these
Alternating current with high frequency is used
Direct current is used
Alternating current with low frequency is used

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Workshop Technology
Linde welding uses

Neutral flame and leftward technique
Neutral flame and rightward technique
Oxidizing flame and leftward technique
Carburising flame and rightward technique

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

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Workshop Technology
The diaphragm moulding machine is used to

Give uniform sand hardness throughout the mould
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Produce uniform packing of sand in the mould
Ram the sand harder at the back of the mould and softer on the pattern face

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