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Copper up for 4th session, zinc rises on China growth hopes

London copper rose for a fourth session on Tuesday, while zinc climbed 1.5 percent on expectations that Chinese data in the weeks ahead will show the economy in the world’s top metals consumer remained strong in April. FUNDAMENTALS * COPPER: ...

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Welding process of 316L stainless steel pipe

(1) welding methods: due to the majority of stainless steel pipes and sizes, according to the welding characteristics of stainless steel, as far as possible, reduce the amount of heat input, the manual electric arc welding, argon arc welding is ...

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