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File:Thulium spectrum visible.png
来自维基百科,自由的百科全书
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File:Thulium spectrum visible.png
Description
Thulium
spectrum
visible
.
png
Thulium
spectrum
; 400 nm - 700 nm Date 3 June 2013, 16:50:52 Source Own work Author McZusatz (talk) Permission