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beam
coherent
computer
counter
crystal
dark
desk
device
display
engineer
enlarge
equipment
experiment
face
glass
glasses
halfbody
hand
head
hold
illumination
indoor
inside
keyboard
lab
laboratory
laser
lens
loupe
magnifying
male
man
measure
microscope
motion
movement
one
optic
probe
radiation
ray
room
samara
science
screen
substance
test
watch
workbench
zoom