Workshop Technology
For welding plates of thickness more than 12.5 mm, its edges

Should be bevelled to a single-V or U-groove
Do not require bevelling
Should have a double-V or U-groove on both sides
Should have a double-V or U-groove on one side

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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
Feed the molten metal to the casting in order to compensate for the shrinkage
Delivers molten metal into the mould cavity

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