British standard (bs) on chalk board
Palabras clave
blackboard,
concept,
signs,
school,
education,
chalk,
success,
black,
text,
word,
board,
blackboard,
information,
illustration,
message,
symbol,
british,
background,
business,
document,
economic,
explaining,
idea,
institution,
lifestyle,
organisation,
pointing,
sharing,
showing,
standard,
strategy,
work
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