機器
background
balance
black
business
button
calculating
calculator
calculus
checkout
clicks
clock
code
computer
count
countdown
counter
customer
digital
display
equipment
figures
finance
gray
hand
industry
instrument
isolated
key
mathematical
mathematics
measurement
metal
nobody
number
object
push
sign
silver
single
small
sport
store
subtraction
tally
technology
time
two
voting
white