Match anyMatch allExact RE setOnly the selected rare earths in the declared composition; other elements are allowed. SDS counts show 件の文書 containing each element under these conditions. “After adding” previews the combined result total. Each PDF appears once in results. Exact matching requires an established composition; it does not certify absence of trace impurities.
Elements describe composition, not chemical form.A material may appear under several elements. An oxide or solution is not an elemental metal. Open “Why this document matches” for the source evidence. Original SDS sources.
