機器
3d
ahead
apparatus
circle
clockwork
cogwheel
concept
conceptual
connecting
development
endurance
energy
engine
engineering
evolution
first
gear
heart
holiday
industrial
isolated
leader
machinery
mechanical
mechanics
mechanism
parts
perfection
pinion
power
precise
precision
progress
quality
rotate
sign
sparepart
strength
strong
symbol
teamwork
tech
technology
tools
transmission
turning
valentine