Understand various forming processes of metal materials (V): Powder Metallurgy
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Understand various forming processes of metal materials (IV): Welding
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Understand various forming processes of metal materials (III): Machining
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Understand various forming processes of metal materials (II): Plastic forming
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Understand various forming processes of metal materials (I): Casting
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The most complete collection of 60 performance test methods for non-metallic materials in history
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The knowledge points about surface roughness can be obtained from this paper
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