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Small diameter seamless steel pipe Oil drill pipe

Small Diameter Seamless Steel PipeIn the outer diameter, steel pipe of 89 mm or less, 4 mm or more, can be collectively referred to as a smalldiameter seamless steel pipe. The smalldiameter colddrawn seamless steel pipe is a circular, square, rectangular steel with a hollow section and no seam at the periphery. It's formed by perforating a steel ingot or a solid tube blank

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