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File:CoCl2 test paper.jpg
来自维基百科,自由的百科全书
Found in articles
File:CoCl2 test paper.jpg
Description
Co
Cl2
test
paper
.
jpg
English:
CoCl2
test
paper
中文:氯化亞鈷試紙。 Date 17 September 2011 Source Own work Author GOKLuLe
File:A popular chemistry; (1887) (14777162354).jpg
browseable online version of this book. Text Appearing Before Image: oride (
CoCl2
) is used as a sympathetic ink.Letters written with a dilute solution of