機器
activity
architecture
arm
build
builder
building
building site
casing
cast
casting
cement
concrete
concrete pumping
concreting
construction
contractor
crane
development
equipment
flow
fluid
foundation
hose
house
industrial
industry
job
labor
machinery
metal
mixer
mortar
operation
people
pipe
pouring
process
project
pump
site
steel
structure
technology
truck
tube
vehicle
work
worker