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2-Roll piercing mill and method of producing hollow blocks...

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Reexamination Certificate

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Apparatus for supporting the piercing mandrel back-up bar of a p

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent

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Application method of Cr-plated mandrel bar for hot rolling

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Reexamination Certificate

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Calibration of an instrument for the cold-rolling of tubes

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Reexamination Certificate

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Cold pilger rolling tool for producing internally ribbed tubes

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Reexamination Certificate

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Cold pilgrim rolling

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent

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Cold rolling process for metal tubes

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Reexamination Certificate

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Cold rolling process for metal tubes

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Reexamination Certificate

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Continuous flow plug mill system

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent

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Continuous pipe rolling process

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent

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Cr-plated mandrel bar for manufacturing hot seamless tube...

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Reexamination Certificate

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Device for changing mandrels in tube rolling mills

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent

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Device for controlling the speed of a mandrel in continuous reta

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent

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Device for inserting and pushing a bar into a press-piercing mil

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent

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Device for inserting and thrusting a bar into a press piercing _

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent

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Durable method for producing finned tubing

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent

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Extraction device for continuous rolling mills using a retained

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent

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Floating cylindrical mandrel and method for producing tubing

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent

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High strength cemented carbide dies and mandrels for a pilgering

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent

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Holding and guiding a mandrel rod in rolled stock in and adjacen

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent

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