英文關鍵字
air
background
blue
car
compressor
construction
control
cool
cooling
cylinder
design
electric
electrical
energy
engine
engineering
equipment
factory
garage
heat
hvac
industrial
industry
isolated
machine
machinery
maintenance
mechanical
metal
motor
motorcycle
object
plant
pneumatic
power
pressure
professional
pump
refrigeration
repair
rotates
service
started
steel
system
tank
technology
tool
valve
wheel
white
work
workshop