MANDREL MILL, OPERATING METHOD OF THE SAME AND PRODUCTION METHOD OF SEAMLESS PIPE
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United States of America Patent
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Issued Date -
Mar 18, 2010
app pub date -
Oct 24, 2007
filing date -
Nov 9, 2006
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Abandoned
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Abstract
of at least a first stand and a second stand are arranged so as to satisfy conditions represented by the following formulas (1) to (4): (1) (2) (3) (4)−S).
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