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Metals (Cutting techniques (Power tools for cutting (Circular saw, Angle…
Metals
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Properties
Chemical
Oxidation 
Ecological
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Toxic 
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Obtention
Surface mining 
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Underground mining 
Shaping techniques
Shaping
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Forging
Industrial 
Traditional 
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Joining techniques
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Temporary joints
Screws 
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Nuts and bolts 
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