Schiefertafel mit der chemischen Formel von Harnsäure
Palabras clave
chemistry,
formula,
chalk,
chemical,
structure,
hand,
board,
text,
plate,
write,
blackboard,
blackboard,
drawing,
illustration,
drawn,
graphic,
signs,
technology,
chemical,
laboratory,
science,
symbol,
studying,
concept,
molecular,
connection,
atom,
handwriting,
slate
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