英文關鍵字
animation
background
business
circle
clock
cog
cogwheel
communication
concept
connection
cooperation
element
engine
engineering
equipment
factory
flat
gear
icon
industrial
industry
isolated
looped
machine
machinery
mechanic
mechanical
mechanism
motion
pair
part
pictograph
power
progress
rotate
rotation
round
set
shape
sign
spin
steel
symbol
teamwork
technical
technology
transmission
two
wheel
work