機器
activity
architecture
backhoe
bridge
builder
building
construction
constructor
contractor
crane
development
dig
digger
dirt
drone
duty
engineering
equipment
excavation
excavator
field
heavy
hoe
hydraulic
improvements
industrial
industry
job
land
machinery
maintenance
manual
mover
power
preparation
professional
progress
river
road
shovel
site
soil
technique
technology
thai
track
transport
vehicle
work