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Create the page "Ruthenium" on this wiki! See also the page found with your search.
- ...ts for incandescent lamps having [[chromium]], [[iridium]], [[rhodium]], [[ruthenium]], [[osmium]], [[molybdenum]] and [[tungsten]] filaments,<ref>{{US patent|5104 KB (15,285 words) - 16:44, 16 December 2018