英文關鍵字
activity
adult
architect
architecture
background
builder
building
bulldozer
business
button
cabin
construction
constructor
contractor
control
controllers
controlling
controls
crane
design
development
driver
engineer
engineering
equipment
helmet
industrial
industry
instrument
joystick
lift
machine
machinery
man
metal
occupation
operating
operator
place
power
profession
professional
pump
remote
safety
site
technology
transport
vehicle
work
worker