機器
account
accuracy
antique
asian
background
black
calculating
calculation
calculator
centimeter
closeup
count
device
education
engineer
equipment
evaluation
governing
inches
instrument
isolated
japanese
length
machinist
math
measure
measurement
measuring
metric
nobody
number
object
old
rule
ruler
school
science
scientific
slide
sliderule
study
teach
technology
tool
training
vintage
white
wood
wooden