accuracy
action
architecture
beam
builder
building
caucasian
concrete
construct
construction
danger
design
development
engineering
equipment
factory
form
hardhat
height
helmet
high
industry
iron
job
labor
level
load
manual
material
men
metal
nail
object
occupation
platform
protection
risk
safety
scaffolding
site
spark
steel
structure
support
team
technology
tool
urban
welder
worker
定額
A construction workers installing beam formwork. Formwork is located at the high level that requires the workers to use scaffolding.の素材 [FY31097034261]
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