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when toggle format what by license comment
Feb 21, 2022 at 14:06 comment added Poutnik I support the Matt's answer, well written. The third major exception ( aside of allloys and minerals) are synthetic ceramic or semiconductor materials.
Feb 21, 2022 at 13:13 vote accept James Arten
Feb 21, 2022 at 13:11 history answered matt_black CC BY-SA 4.0