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2022

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05

How is the hollow steel used to make the drill rod produced?

Production of hollow steel for drill rod: electric furnace smelting-LF furnace refining-bloom continuous casting machine casting billet

Production of hollow steel for drill rod: electric furnace smelting-LF furnace refining-bloom continuous casting machine casting billet-preliminary rolling mill rolling intermediate billet-deep hole drilling machine drilling hole-adding mandrel-semi-continuous rolling mill rolling hollow steel-controlled cooling-quality inspection-fixed-length cutting-transferred to the drill rod production line.

 

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