英文關鍵字
business
clock
cogwheel
communism
concept
cooperation
design
dictatorship
element
engine
engineering
equipment
factory
gear
gold
gray
group
industrial
industry
machine
machinery
mechanical
mechanics
mechanism
metal
modern
power
preciseness
precision
rim
roll
rotate
rotation
round
set
socialism
solid
spin
steel
steering
system
technology
time
totalitarianism
transfer
transmission
turn
wheel
work