機器
abstract
accuracy
background
clock
closeup
cog
cogwheel
concept
connect
connection
detail
drive
energy
engine
engineering
equipment
gear
gearbox
industrial
industry
innovation
iron
lubricant
machinery
mechanic
mechanical
mechanism
metal
molding
motor
moulding
old
part
pattern
pinion
power
precision
process
reducer
reduction
swiss
system
technology
time
tooth
transmission
turning
wheel
working