英文關鍵字
3d
alternator
animation
automobile
automotive
box
delivery
electric
electrical
electromechanical
engine
equipment
generator
generic
green
icon
illustration
isolated
isometric
machine
machinery
maintenance
mechanical
mechanism
metal
motion
new
object
power
realistic
repair
replacement
screen
service
shipment
sign
single
spare
steel
symbol
technology
torque
transportation