英文關鍵字
laboratory
centrifuge
line
symbol
outline
chemistry
burner
heating
device
scales
lab
tool
linear
contour
background
lined
protective
respirator
facial
mask
nuclear
power
waste
dangerous
watering
can
glove
flask
hand
holding
autoclave
monochrome
icon
motion
graphic
animation
pictogram
hd
animated
item
sign
black