Workshop Technology
The purpose of a gate is to

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

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Workshop Technology
Linde welding uses

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

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Workshop Technology
The purpose of a riser is to

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

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