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potting and stamping : ウィキペディア英語版 | potting and stamping
Potting and stamping is a modern name for one of the 18th century processes for refining pig iron without the use of charcoal. ==Inventors== The process was devised by Charles Wood of Lowmill, Egremont in Cumberland and his brother John Wood of Wednesbury and patented by them. The process was improved by John Wright and Joseph Jesson of West Bromwich, who also obtained a patent.
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