angle
background
beaker
biology
blackboard
blank
board
button
chalk
chalkboard
chemistry
class
classroom
clock
degree
education
experiment
flask
frame
geometry
glass
glassware
grid
hour
icon
illustration
instrument
isolated
laboratory
liquid
measure
medical
minute
object
panel
protractor
ruler
school
set
sign
symbol
test
tilt
time
transparent
watch
white
定額
Set Clock, Chalkboard, Test tube and flask chemical laboratory and Protractor grid for measuring degrees. Square glass panels. Vectorの素材 [FY310143340937]
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