كسارة الفك BROYEUR. محجر كسارة concentrateur Mark Barr Wikipedia James Mark McGinnis Barr May 18 1871 PennsylvaniaDecember 15 1950 The Bronx was an electrical engineer physicist inventor and polymath known for proposing the standard notation for the golden in America but with English citizenship Barr lived in both London and New York City at different times of his life
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