Niobium Production in Brazil
Harry visited the niobium mines in Araxa, Brazil, as a part of a meeting organised by CBMM on the heat affected zones of pipeline steel welds.
David Delagostini Jarreta (on the left) and Daniel Pallos Fridman, both with CBMM
https://www.phase-trans.msm.cam.ac.uk/2011/CBMM/index.html
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