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making machinery( ) construction material making machinery parts( ) construction material stocks( ) construction materials agents( ) construction materials processing( ) construction projects( ) construction tools( ) construction tools & machinery( ) copper pipes( ) countertops, vanity tops & table...
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zircon contained a new "earth"--a term early chemists applied to metal oxides--distinct from the already well characterized alumina was martin heinrich klaproth, and he named the new metallic element for its source mineral in . the famous chemist jons jakob berzelius was the first to actually isolate...