機器
arm
big
bulldozer
cable
car
chrome
connection
connectors
construction
cylinder
detail
digger
engine
engineering
equipment
excavator
factory
forklift
heavy
hose
hydraulic
hydraulics
industrial
industry
injection
iron
machinery
mechanical
metal
new
pipes
piston
power
powerful
pressure
pump
repair
service
shaft
steel
system
technology
tool
tractor
transport
tube
vehicle
work
yellow